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Odin Fitness Blog

Science-Backed Fitness Guides

Evidence-based articles on calisthenics, nutrition, and building habits that last. No fluff, just what the research actually says.

Beginner Guides

Exercise Progressions

Training Science

Training Science12 min read

Jumping Jacks vs Pistol Squats: Muscles, Calories, and Who Each Is Best For

Jumping jacks are a warm-up. Pistol squats are a strength skill. Compare muscles worked, calorie burn, and mobility benefits — and learn how to use both.

Jun 2026Read article →
Training Science14 min read

3 Sets of 5–8 Reps Bodyweight Training: The Hypertrophy Guide

Why the 5–8 rep range builds serious muscle with bodyweight exercises — plus exercise selection, progression rules, and a complete workout template.

Jun 2026Read article →
Training Science14 min read

Can You Build Muscle With Bodyweight Training?

The science says yes. Learn how progressive overload works without weights and how to structure your program for hypertrophy.

May 2026Read article →
Training Science11 min read

The Science of Progressive Overload for Bodyweight Training

Why progressive overload is the single most important training principle, and exactly how to apply it without a barbell.

Jan 2026Read article →
Training Science10 min read

Bodyweight Training vs. Weightlifting: Functional Strength

An honest comparison of calisthenics and weight training across strength, muscle, skill, and real-world applicability.

Jan 2026Read article →
Training Science9 min read

The 5 Bodyweight Exercises You Need to Build Muscle

If you only had five movements, these would be them. The science behind each exercise and how to progress them.

Jan 2026Read article →
Training Science8 min read

Best Time of Day to Work Out: The Science Explained (2026)

Morning vs. evening training — what the research actually says and how to pick the time that works for you.

Mar 2026Read article →

Nutrition

Lifestyle