Planfit Blog

How many sets for strength? 3 heavy sets, 3×/week

4 studies · Currier 2023 meta-analysis

Wondering how many sets to do for strength? The answer is simpler than you think — per a 178-study Bayesian meta-analysis in Br J Sports Med.

Postpartum Workout Plan: 4-Day Bodyweight (Intermediate)

A 4-day bodyweight postpartum workout plan for intermediate exercisers: upper, lower, push, and pull days, one piece of equipment needed.

Beginner Workout Plan for Women: 3-Day Gym Split

A 3-day gym workout plan for beginner women: push, pull, and legs, with simple sets and reps to build strength without guesswork.

7-Day Gym Workout Plan for Intermediate Lifters

A 7-day gym split for intermediate lifters: push, pull, legs, upper body, lower body, with two rest days built in. All equipment-based moves.

5-Day Workout Plan for the Gym (Intermediate)

A 5-day gym split for intermediate lifters: push, pull, legs, upper, lower. See exactly what to do each day and how to progress.

30-Day Workout Plan: 4-Week Gym Split (Intermediate)

A 4-day gym split for intermediate lifters, repeated for 30 days with a set weekly progression plan. Upper, lower, push, and pull days covered.

Dumbbell Workout Plan: 4-Day Intermediate Split

A 4-day dumbbell workout plan for intermediate lifters: upper, lower, push, and pull days. Just dumbbells and a bench, no machines needed.

Calisthenics Workout Plan: 4-Day Bodyweight (Intermediate)

A 4-day bodyweight calisthenics plan for intermediate lifters: upper, lower, push, and pull days, no gym required except a pull-up bar.

Unilateral training builds equal muscle: 2025 meta-analysis

5 studies · 2025 Sports Med meta-analysis

Unilateral training builds the same muscle as bilateral, but strength transfers differently — per a 2025 Sports Med meta-analysis of 9 RCTs.

Going to the gym for the first time: 6 mistakes to avoid

Planfit coaching · exercise-science consensus

Going to the gym for the first time? Avoid the 6 mistakes that send most beginners home for good — movement choice, load, rest, and what to do on day one.

Proper squat technique: 5 mistakes, per a 2024 review

4 studies · 2024 scoping review + AJSM

Proper squat technique comes down to 5 mistakes — knee cave, depth, torso lean, load, warm-up. Fixes backed by a 2024 scoping review.

Overtraining symptoms: 0 of 39 studies found a biomarker

5 reviews · Sports Med + Int J Sports Physiol Perform

Overtraining symptoms are real — stalled lifts, poor sleep, low mood — but no test confirms them: 0 of 39 studies found a validated biomarker.

Push pull legs 5-day split: volume is the only lever

4 RCTs · 1 meta-analysis · J Strength Cond Res

A push-pull-legs 5-day split builds as much muscle as any structure — if weekly volume per muscle group is matched. Here is how to build the week.

Creatine is not bad for your kidneys, per Antonio's 2021 review of over 500 published studies

3 studies · 500+ papers reviewed

Creatine doesn't harm healthy kidneys — rising creatinine is a muscle byproduct, not kidney damage. A 2021 review of 500+ studies confirms it.

Bulgarian split squat form: 5 fixes, per a 2025 RCT

3 studies · 2025 RCT + J Strength Cond Res

Bulgarian split squat form comes down to 5 fixes — foot distance, rear foot, depth, torso angle, side-to-side gap. Backed by a 2025 RCT.

Deadlift form: 5 mistakes, per three 2025 RCTs

3 RCTs · 2025 priority journals

Deadlift form breaks at the hip hinge, not the back. Fix bar path, brace and variant choice — per three 2025 RCTs on hamstring mechanics.

Heat beats ice for sore muscles — especially after 24 hours, per a 2021 meta-analysis

5 studies · 32-RCT meta-analysis (2021)

Ice isn't the best DOMS fix — heat works better, especially past 24 hours, per a 2021 meta-analysis of 32 RCTs and 1,098 people.

Motor control exercises beat generic rotator cuff routines, per a 2024 meta-analysis

22 RCTs · 2024 meta-analysis

Rotator cuff pain doesn't need generic exercises — motor control training cuts disability more, per a 2024 meta-analysis of 22 RCTs and 1,281 people.

Coffee before or after a workout? Two different jobs, per 21 meta-analyses

5 studies · Grgic 2020 umbrella review

Coffee before training boosts strength and endurance; coffee after training speeds glycogen refill by over 2x, per a 2021 RCT and 21 meta-analyses.

How Many Sets of Squats? 3 for Strength, 5 for Size

5 studies · Schoenfeld 2019 RCT + meta-analysis

Wondering how many sets of squats to do? 3 is the strength sweet spot, 5 adds size — per a 2019 RCT of 34 trained lifters and a Sports Med meta-analysis.

Training to failure isn't necessary for muscle growth — stopping 1–4 reps short works just as well

4 meta-analyses · Sports Med 2023 & 2024

You don't have to grind every set to failure. Stopping 1–4 reps short builds just as much muscle — per 4 meta-analyses including Sports Med 2023 and 2024.

The biggest fitness myths, debunked: what a 2025 survey of 721 gym-goers revealed

2 studies · 2025 Sci Rep survey of 721 gym-goers

The pump, soreness, hormone spikes — five myths that run most gym programmes, and what the evidence actually says, per a 2025 survey of 721 gym-goers.

Lower back pain after a deadlift: when it's normal soreness — and when it's an emergency

3 clinical case reports · J Orthop Surg Res 2024

Most post-deadlift back pain is normal muscle soreness. But 3 clinical cases show exactly when it becomes an emergency — and what the red flags look like.

Stretching doesn't prevent injury — but a hip and core programme cut overuse injuries 39% (2024 RCT)

3 studies · 2 RCTs · 2024 BJSM RCT

Stretching before a run won't stop you getting hurt. Here's what actually works — according to a 2024 RCT of 325 novice runners in Br J Sports Med.

Foam rolling does reduce soreness and improve range of motion — what 6 studies actually found

6 studies · 2 systematic reviews, 3 RCTs

Foam rolling cuts soreness, boosts flexibility, and speeds recovery — but dosage and timing matter. Here's what 6 peer-reviewed studies actually found.

Wrist pain from lifting is almost always a grip or load problem — not a wrist problem

4 studies · BMC Musculoskelet Disord 2023

Wrist pain during lifting usually comes from grip width, wrist extension, or nerve compression — not the wrist joint itself, per a 2023 study of 868 weightlifters.

Lengthened partials build as much muscle as full reps — and may grow it faster per set

5 studies · 2025 multi-site RCT (n=297)

Lengthened partials match full range-of-motion training for muscle growth — and beat it on a per-set basis, per a 2025 RCT across 15 sites with 297 participants.

Beta-alanine does work — but only for the right type of effort, per a 2026 meta-analysis of 17 RCTs

5 studies · 2026 meta-analysis of 17 RCTs

Beta-alanine raises muscle carnosine and cuts fatigue in high-intensity efforts lasting 1–4 minutes — but a 2026 meta-analysis of 17 RCTs found zero benefit for repeated sprints.

Zone 2 cardio works — but your watch's heart-rate zones are probably wrong

4 studies · 2025 Sports Med meta-analysis

Zone 2 is real and effective — but fixed % of max HR varies up to 29% between individuals, per a 2025 study of 50 cyclists. Here's how to find your actual zone.

Squat knee pain is almost always a kneecap problem — usually your knee caving in, not the squat

5 studies · 2 meta-analyses · JAMA + Br J Sports Med

Knee pain during squats usually has one fixable cause. Here's what to check, what to change, and when to back off — per a 2022 Br J Sports Med meta-analysis and 4 other studies.

How to warm up before lifting: movement-specific beats everything else — backed by 4 RCTs

4 RCTs · J Sports Sci, Scand J Med Sci Sports

Skip the treadmill jog. A movement-specific warm-up outperforms cycling, vibration, and foam rolling — per 4 RCTs in top sports-science journals.

Sauna after your workout, not before — it cut systolic blood pressure 8.0 mmHg in a 2022 RCT

4 studies · RCT + 2 reviews

Sauna before or after your workout? The research is clear: post-workout sauna adds real cardiovascular gains — per a 2022 RCT and two priority-journal reviews.

Dynamic stretching belongs in your warm-up, static stretching after — what 35 studies found

5 studies · 2 meta-analyses · J Strength Cond Res

Dynamic stretching keeps strength intact before a workout. Static stretching can reduce force output if you overdo it. Here's exactly how to use both, per a 2023 meta-analysis of 35 studies.

Creatine works for women — here's what 69 studies and a 2-year RCT of 237 women actually found

4 studies · 2 meta-analyses + 1 RCT

Creatine isn't just for men. It builds strength, protects muscle, and supports bone health — per a 2025 meta-analysis of 69 studies and a 2-year RCT of 237 postmenopausal women.

Is body recomposition real? You can lose fat and build muscle at once — here's what drives it

4 studies · Med Sci Sports Exerc 2022

Lose fat and build muscle at the same time? Yes, it's real. Here's what the research says actually drives body recomposition, per a 2022 Med Sci Sports Exerc analysis.

Spot reduction is (mostly) a myth — but one 2023 RCT found a small trunk-fat edge

2 RCTs · Brobakken 2023 + Zourmand 2025

Crunches won't melt belly fat on their own. Here's what two RCTs actually found — and what that means for how you train.

Coffee before a workout does help — but only if you time it right, per a 24-study meta-analysis

3 studies · Gardiner 2023 meta-analysis

Pre-workout coffee can sharpen focus and cut perceived effort — but drink it too late and it steals 45 minutes of sleep, per a 2023 meta-analysis of 24 studies.

Workout duration doesn't predict muscle growth — sets do, per a 2020 meta-analysis of 111 studies

2 studies · Benito 2020 meta-analysis of 111 RCTs

Stop watching the clock. Muscle growth comes down to sets per workout, not minutes on the floor — according to a 2020 meta-analysis of 111 studies.

Squat vs. leg press: the muscle gains are the same when volume matches, per a 2025 RCT of 70 women

4 studies · Kassiano et al. 2025 RCT

Squat vs. leg press: which builds more muscle? When sets and reps are matched, growth is virtually identical — according to a 2025 RCT of 70 trained women.

RPE vs RIR: the number that tells you exactly how hard to push — backed by 4 RCTs

4 RCTs · J Strength Cond Res priority journals

RPE and RIR are two ways to measure effort in real time. Here's what 4 RCTs say about which one works, when, and for whom.

Magnesium won't stop your muscle cramps — unless you're deficient, per a 2020 Cochrane review

4 studies · Cochrane 2020 meta-analysis

Magnesium supplements are the go-to for muscle cramps — but a 2020 Cochrane meta-analysis found no reliable benefit for most people. Here's what actually matters.

Cardio before or after weights: why the order depends on your goal

3 studies · 2024 meta-analysis (23 RCTs, n=916)

Do cardio before or after lifting? The answer depends entirely on your goal. Here's what the interference effect and a 2024 meta-analysis of 23 RCTs actually say.

The trap bar deadlift isn't a shortcut — it's the smarter pull, backed by posterior-chain research

4 studies · Sports Med Open review + 2 RCTs

Trap bar deadlift benefits go beyond 'easier on the back.' Here's what posterior-chain research and deadlift RCTs actually say about strength, safety, and power.

The goblet squat isn't a beginner move — it fixes your squat form, then cuts blood-sugar spikes 22%

2 studies · RCT + meta-analysis

The goblet squat fixes forward lean, builds legs, and — per a 2024 RCT — squat breaks cut post-meal blood sugar 22%. Here's how to use it.

How Many Sets of Biceps Per Week? 10 Is Your Ceiling

3 RCTs · Med Sci Sports Exerc + J Strength Cond Res

More biceps sets doesn't mean more growth. Two RCTs show 5–10 weekly sets match or beat 15–32 — here's the number that actually matters.

How Many Sets of Deadlifts? 3–5 Per Session Is Enough

5 studies · Sports Med meta-analysis

Wondering how many sets of deadlifts to do? 3–5 working sets is the evidence-based sweet spot — according to a Sports Med meta-analysis and a 2022 RCT.

Exercise does suppress appetite — but a muscle molecule, not willpower, is why (2016 meta-analysis)

4 studies · meta-analysis + RCT + 2 reviews

Does exercise make you eat less? Yes — but the mechanism is a molecule called Lac-Phe, not willpower. Here's what the research actually says, per a 2016 meta-analysis and a 2021 RCT.

Full-body vs. split training: muscle and strength gains are the same — per a 2024 meta-analysis

4 studies · 2024 meta-analysis (14 studies, 392 subjects)

Full-body or split? For muscle growth and strength, the answer is neither — they're equal, per a 2024 J Strength Cond Res meta-analysis of 14 studies.

3 days a week is enough — and a J Strength Cond Res RCT of 32 athletes proves it works

3 studies · RCT + review + 2026 RCT

Wondering how many days a week to work out? 3 sessions gets the job done — per an RCT in J Strength Cond Res and exercise guideline reviews.

How Many Sets of Bench Press? 3 for Strength, 5 for Size

4 studies · Schoenfeld 2019 RCT

3 sets of bench press builds strength as well as 5 — 5 sets add more muscle. What a 2019 RCT in Medicine & Science in Sports & Exercise found.

Time under tension does matter — just not the way you think

2 studies · Mang 2022 review + RCT

TUT isn't the main driver of muscle size — but it unlocks real aerobic and tendon adaptations. Here's what the research actually shows, per a 2022 review and RCT.

Rep range almost doesn't matter for muscle growth — what 4 RCTs actually say

4 studies · 3 RCTs · 2 priority journals

5 reps or 30 reps — it barely matters for hypertrophy. Here's what the evidence from 4 recent RCTs actually says about rep ranges and muscle growth.

Creatine is not bad for your heart — in fact, creatine cut mortality in a 2016 meta-analysis

4 studies · meta-analysis + 2 reviews

Think creatine damages your heart? The opposite is true. Here's what the cardiac research actually shows, per a meta-analysis of 41 controlled trials.

Mechanical tension is the primary driver of muscle growth — and 5 peer-reviewed reviews in Sports Med explain exactly why

5 reviews · Sports Med, Eur J Appl Physiol

Mechanical tension isn't just one factor in muscle growth — it's the main one. Here's what the science actually says, across 5 reviews in top sports-science journals.

Progressive Overload Is the Only Variable That Actually Guarantees Muscle Growth.

4 studies · ACSM 2026 overview of reviews

Adding weight isn't the only way to progressively overload — reps work just as well, according to a 2024 RCT and an ACSM overview of 137 systematic reviews.

How Many Sets Per Muscle Group Per Week? 10 Is Enough

4 studies · 2 meta-analyses · Sports Med 2024

Most lifters chase 20+ sets per muscle. The research says you can grow on far less — per a 2024 Sports Med meta-analysis.

Mind-Muscle Connection Matters — But Only Below 60% of Your 1RM

4 RCTs · Schoenfeld 2018

Focusing on the target muscle really does boost hypertrophy and EMG activation — but the effect vanishes at heavy loads, according to 4 controlled studies.

How Many Sets Per Workout? Total Volume Is What Matters

4 studies · 1 meta-analysis (111 RCTs)

Wondering how many sets per workout you actually need? The answer is simpler than you think — according to a 2020 meta-analysis of 111 studies.

3 minutes beats 1 minute — and the data on rest periods is clearer than you think.

3 studies · Schoenfeld 2016 RCT + 2024 meta-analysis

Resting longer between sets builds more strength and likely more muscle. Here's exactly how long to rest, according to a 2024 Bayesian meta-analysis and two RCTs.

Soreness is not a measure of muscle growth.

3 studies · Zhang 2026 meta-analysis

Feeling wrecked after leg day doesn't mean you're building more muscle. Here's what the science actually says — including a 2026 meta-analysis of 49 studies.

The Anabolic Window Is a Myth.

3 studies · Schoenfeld 2018 review

You don't need to slam a protein shake the second you rack the bar. Here's what the research actually says about post-workout nutrition timing, according to two landmark reviews.