Stability Ball Hamstring Curl
The stability ball hamstring curl is a leg curl for the hamstrings, done with bodyweight only. It also works the glutes. On weyt.ai it counts toward Balance as Hamstrings (minimum 6 sets per 30 days) and toward your 12-week strength trend, where each rep counts as 30% of your bodyweight plus whatever you add.
At a glance
| Muscle group | Hamstrings |
|---|---|
| Primary muscles | hamstrings |
| Secondary muscles | glutes |
| Equipment | Bodyweight |
| Logged as | Reps per set |
| Strength scoring | Counts as a lift, each rep 30% of bodyweight plus whatever you add |
| Balance group | Hamstrings · minimum 6 sets per 30 days |
| Strength standards | none (standards exist for barbell and dumbbell lifts with published norms) |
How weyt.ai scores it
- Balance: every logged set counts toward the Hamstrings group, which needs at least 6 sets per 30 days for full credit.
- Strength: counts as a lift. Each rep counts as 30% of your bodyweight plus whatever you add, so it earns volume, a best lift estimate (an estimated one-rep max) and PR credit like a loaded lift.
- Routine: any session that includes it counts toward your weekly target, the 4-week consistency window and your streak.
Scoring is plain arithmetic, not AI: the same sets always give the same result. Read the method on the about page.
Also called
swiss ball leg curl, stability ball leg curl, ball hamstring curl, swiss ball hamstring curl, exercise ball leg curl, physio ball hamstring curl
Log it under any of these names and weyt.ai files it under the same exercise, so your history never splits across spellings.
Related hamstrings exercises
Everything else that counts as hamstrings
Good Morning · Glute Ham Raise · Romanian Deadlift · Dumbbell Romanian Deadlift · Single-Leg Romanian Deadlift · Kettlebell Romanian Deadlift · B-Stance Romanian Deadlift · Dumbbell Sumo Romanian Deadlift · Smith Machine Romanian Deadlift