Hamstring Flexibility


Before discussing hamstring flexibility, we need to talk about testing hamstring flexibility. Many athletes believe their hamstrings are tight. But, often they have all the hamstring flexibility they need to perform normal activities of daily living and sporting activities. Outside of activities like yoga, Pilates, gymnastics, and cheer, if an athlete passes the following tests, they do NOT need to work on hamstring flexibility.

To assess hamstring flexibility, the athlete should lie supine with both legs straight. A coach or training partner should then raise one leg. While maintaining full knee extension until the athlete feels tension in the posterior thigh. Athletes with good flexibility should have an 80+ degree angle of their thigh at the stretching point. This athlete has an 80-90 degree angle of her thigh relative to the ground indicating good flexibility of the hamstring muscles. Note the hand placement of the tester, maintaining the knee in full extension.

This athlete has an 80-90 degree angle of her thigh relative to the ground indicating good flexibility of the hamstring muscles. Note the hand placement of the tester, maintaining the knee in full extension.


We also need to assess an individual’s ability to utilize their available hamstring flexibility in the hip hinge pattern. This pattern forms the basis of many of the movements performed by fitness athletes and the general population in daily tasks. To assess this, read THIS ARTICLE.

Okay, let’s get to my favorite exercises for improving hamstring flexibility!


Romanian Deadlift Eccentric Isometrics

Eccentric isometrics have long been one of my favorite ways to create mobility changes. Eccentric muscle contractions (or slowly lowering during a lift) have been shown to create lengthening inside the muscle fibers themselves. Combining slow eccentrics (3-7 seconds) with a pause in the stretched position (2-5 seconds) makes for a great combination to improve mobility, movement control/technique, strength, and muscle hypertrophy.

With the hamstrings, my go-to drill for improving mobility is almost always eccentric isometric RDLs.

Hamstring PAILs/RAILs

PAILs/RAILs are a mobility technique involving a static stretch for a period followed by hard, intense isometric contractions at end range. When performing static stretches, we get the nervous system to relax into new ranges of motion. The problem is, the body will easily revert to its previous levels of stiffness. By performing these isometric contractions, we can “hit save” on some of the mobility improvements we make. These work especially well with the hamstrings.


Reverse Active Straight Leg Raises

So many athletes with hamstring tightness lack the pelvis control to actively use their hamstring flexibility. Or, as they improve their flexibility, they don’t know how to use to and move through the hips rather than moving through the spine.

The reverse active straight leg raise combines hamstring flexibility work with the athlete having to control his/her pelvic positioning. Making this a great combo for a lot of athletes.


Band Pullover Straight Leg Raises

These are similar to the reverse active leg raises in their strength and mobility combination. the band pullover straight leg raises are great to get athletes stabilizing their pelvis position before moving the hamstrings through range of motion.

Sciatic Sliders

Quite often, athletes will feel tension in the back of their thigh and immediately think they have tight hamstrings. BUT commonly, I find that mobilizing the sciatic nerve can have a greater effect than stretching the hamstrings. My friend Erson Religioso shares some great variations of nerve glides to improve sciatic nerve mobility.

Body Tempering

Body tempering is a soft of soft tissue mobilization created by legendary powerlifter Donnie Thompson. It involves rolling heavily weighted cylinders on muscles and/or joints to create a nervous system effect. Body tempering works great on hamstrings, and when we combine with some active movements like those shown above, we can see great, rapid results. Below I’m using the Forge Body Tempering Device.