Hoseong Kim

Credentials

• NSCA Certified Personal Trainer (NSCA-CPT)
• Level 2 Sports Instructor (Bodybuilding), Republic of Korea

Experience

Hoseong Kim has been weight training for 10 years. As Planfit's Head Coach, Hoseong reviews the workout plans the app recommends based on each user's goals and experience level, as well as its exercise guides. Hoseong also writes articles for Planfit and coaches Planfit team members in their training.

Personal Interests

Hoseong is happiest when eating good food.

Future Goal

Hoseong's goal is to make Planfit the world's No. 1 workout service.

Articles

• What Is a Split in the Gym? 4 Workout Splits Explained
• Deadlift form: 5 mistakes, per three 2025 RCTs
• Bulgarian split squat form: 5 fixes, per a 2025 RCT
• How Many Sets of Squats? 3 for Strength, 5 for Size
• Heat beats ice for sore muscles — especially after 24 hours, per a 2021 meta-analysis
• Motor control exercises beat generic rotator cuff routines, per a 2024 meta-analysis
• Training to failure isn't necessary for muscle growth — stopping 1–4 reps short works just as well
• The biggest fitness myths, debunked: what a 2025 survey of 721 gym-goers revealed