What is the best free hypertrophy program?
It depends on how many days you can train. On 3 days, Greg Nuckols' Beginner Program (Hypertrophy variation) or Natural Hypertrophy's Novice program. On 4 days, PHUL if you also want strength, or Alberto Nuñez's Upper Lower Program if you want pure size. On 5 to 6 days, Reddit PPL or KONG. Among free hypertrophy-focused programs on Boostcamp, PHUL has been joined by the most lifters (32,321 as of September 2026) and KONG has the most ratings, averaging 4.36 stars from 3,686.
How many days a week should I train for hypertrophy?
Research reviews suggest training each muscle at least twice a week tends to beat once a week (Schoenfeld, Ogborn and Krieger, Sports Medicine, 2016), and that when total weekly volume is matched, frequency beyond that matters less (Schoenfeld, Grgic and Krieger, Journal of Sports Sciences, 2019). In practice that means 3 full body days, 4 upper/lower days, or a 5 to 6 day split can all work. Pick the one you can actually keep up with.
What's the difference between PHUL and PHAT?
Both mix heavy strength days with higher-rep hypertrophy days. PHUL is 4 days a week (two power days, two hypertrophy days, split upper and lower) with roughly 60-minute sessions. PHAT is 5 days (two power days, then three hypertrophy days) with sessions closer to 90 minutes. PHUL is the easier one to recover from and fit into a week; PHAT has more total volume.
Is PPL or upper/lower better for building muscle?
Both train each muscle about twice a week, so the growth stimulus can be similar. Upper/lower does it in 4 days; PPL needs 6 (or 5 with a hybrid like PPLUL) but gives each muscle more sets per session. If you can reliably train 6 days, PPL lets you fit more volume. If your schedule is less predictable, upper/lower is easier to stick with.
Are these programs really free?
Yes. All 14 programs on this page are free on Boostcamp, including the progression logic and the workout tracker you log them in. Boostcamp Pro ($59.99/year or $14.99/month) adds analytics like the Strength Score and per-muscle volume heatmap plus 20+ exclusive coach programs, but none of the programs here require it.
Can I build muscle with a dumbbell-only program?
Yes, as long as you keep progressing, adding reps or sets when you can't add weight. The r/Fitness Dumbbell PPL is the most-joined dumbbell-only program on Boostcamp (11,839 lifters as of September 2026). The main limit is lower-body loading once your legs outgrow your heaviest dumbbells.
Where do the numbers on this page come from?
From Boostcamp's own program library, pulled on September 27, 2026. "Joined" is how many lifters have started each program in the Boostcamp app (not how many finished it). Ratings are the in-app average and the number of ratings. Weeks, days per week and session length come from each program as published by its coach.