KRUGLOKnowledge
All programs
HealthIntermediate10 weeks2 workouts per week20 minutes

Hamstring Armor

The Nordic curl — the most researched hamstring injury prevention tool

Who it’s for

You run, play team sports, or have previously pulled a hamstring.

How it works

The foundation is the Nordic hamstring curl: lowering your torso forward with fixed ankles, slowly and under control. A review of ten systematic reviews and over 17,000 participants showed a reduction in hamstring injuries. To be honest: the frequently cited 51% reduction figure was later revised methodologically, making the estimate uncertain—the exercise is solid, but the exact number is debated.

Weekly layout

1Nordic curl & single-leg RDLhinge · isolationStart this workout2Glutes & calveshinge · isolation · carryStart this workout

How load increases

Start with partial range and hands assisting: 2 sets of 5. Work up to 3 x 8 with a 4-second eccentric lowering and a pause at the bottom. Place at the end of the session, not before speed work.

Deload

Every fifth week: one day instead of two.

Tailored to your health

Some exercises will be automatically swapped or removed based on your health profile:

Knee pain

Programs are for guidance only and are not medical advice. Consult a doctor if you have health conditions.
© 2026 ИП Круглов · БИН 920203350537