Solutions for the Hamstrung
Tight hamstrings are a common cause of injuries and inefficiency in various activities. Fortunately, correcting them is as easy as 1-2-3.
By Matt Fitzgerald
Begin with a simple test. Stand up, bend forward at the waist, and try to touch your fingertips to your toes without bending your knees. If you can’t, then your hamstrings — the muscles running along the back of your thigh — are probably tighter than they should be. Consequently, you have an elevated risk for low back pain and knee injuries, and your performance in sports and exercise may be compromised. Fortunately, by incorporating a few simple techniques into your exercise program, you can quickly loosen your hamstrings and thereby reduce your injury risk and improve performance.
Why Can’t I Touch My Toes?
An important job of the hamstrings is to relax and lengthen when you’re trying to lift your thigh or straighten your knee. Having tight hamstrings means you’re unable to lift your thigh (or bend your trunk toward your thigh) or straighten your knee as fully or easily as you should be able to. According to Greg Roskopf, founder of Muscle Activation Techniques (www.muscleactivation.com), based in Greenwood Village, Colo., the toe-touching test described above is not a clinical method of diagnosing tight hamstrings. “But it’s a fairly reliable self-test,” he says.
Why do some people have tighter hamstrings than others? “Some people are just born with shorter hamstrings,” says Sarah Wiley, associate director of strength and conditioning at the University of Minnesota-Twin Cities. But even when the hamstrings are not naturally tight, they often become tight to compensate for weakness or instability elsewhere in the body. “Specifically, tight hamstrings are often an indication of weak lower abdominal muscles and/or weak lower back muscles,” says Paul Goldberg, MS, RD, CSCS, who serves as the strength and conditioning coach of the Colorado Avalanche hockey team.
All three of these muscle groups — the lower abdominals, the low back muscles, and the hamstrings — attach to the pelvis. The lower abdominal and low back muscles tend to tilt the pelvis forward, whereas the hamstrings tend to tilt the pelvis backward. If either the lower abdominal muscles or the low back muscles are weak (which is quite common), these muscles will not be able to counterbalance the pull of the hamstrings, which will shorten and tighten as they tilt the pelvis backward.
The hamstrings often tighten in response to a previous injury, either to the hamstrings themselves or another part of the body, such as the low back.
The Painful Consequences
There are worse problems than tight hamstrings, but they do have three unfortunate consequences.
Low back pain: Because the hamstrings attach to the pelvis, when they are tight they pull back on the pelvic bone, creating a backward tilt of the pelvis that puts strain on the lower back. “I see a lot of low back pain in my athletes with tight hamstrings,” says Wiley.
Joint Injuries: Tight hamstrings often alter movement patterns during sports and exercise activities, which may put excessive strain on certain joints. “It’s like having bad alignment on your car,” says Roskopf. “Eventually you get increased wear and tear on the joints.” A good example is bicycling, an activity in which tight hamstrings cause some cyclists to ride with their knees splayed wide, which puts torsional strain on the knees, often causing injury.
Inefficient movement: Tight hamstrings reduce the efficiency of sports and exercise movements in two ways. First, they limit range of motion, which, for example, limits stride length and therefore speed during running. Tight hamstrings are also unable to relax properly during thigh lifting and leg straightening movements, creating internal resistance against these movements.
Three Ways to Loosen Up
Increasing hamstrings flexibility isn’t difficult. All it requires is that you slightly modify your workouts to incorporate three types of exercises that are known to lengthen and relax the hamstrings: dynamic warm-up exercises, corrective strength training, and post-workout stretching.
1. Dynamic Warm-up Exercises
Dynamic warm-up exercises are movements that actively stretch the muscles that will be required to elongate in a workout. These types of exercises stimulate the nervous system, preparing it for the movements to come, and elevate the core body temperature, increasing the pliability of the muscles and connective tissues. “Doing dynamic warm-up exercises may not help you overcome tight hamstrings immediately,” says Wiley, “but it helps you work out with a fuller range of motion, which will lead to improvement over time.”
Dynamic warm-up exercises also reduce the likelihood of hamstrings strains during subsequent high-intensity training. Here are two dynamic warm-up exercises that Wiley recommends doing before each workout. Do five to 10 minutes of light, non-stretching activity (such as stationary cycling) before doing these exercises.
Tilt Walk
From a standing position, take one step forward and balance on the forward foot. Tilt your torso forward at the waist until your trunk is parallel to the floor. Extend your free leg behind you for balance. Return to an upright position and then step forward with the opposite foot and tilt once more. Continue for 30 seconds.
Frankensteins
Begin in a standing position with both arms extended straight in front of you like Frankenstein’s monster. Begin walking slowly forward by kicking each leg forward as high as possible, aiming to touch your right toe to your right palm and your left toe to your left palm. Keep your legs as straight as possible and don’t let your trunk flex forward. Continue for 20 to 30 seconds.
2. Corrective Strength Training
There are two types of strength exercises that you can use to overcome tight hamstrings. First, you can strengthen the muscles whose weakness tends to cause the hamstrings to tighten as a compensatory reaction. As these muscles gain strength, your hamstrings will naturally relax. In particular, focus on strengthening the muscles of the lower abdomen and the low back. Good examples are reverse crunches for the lower abs, back hyperextensions for the low back, and full sit-ups for the hip flexors.
A second type of corrective exercise for tight hamstrings targets the hamstrings themselves. Specifically, Wiley recommends doing weighted exercises that require eccentric hamstrings contractions (where your hamstrings resist their own lengthening, such as during the lowering phase of a squat) through a full range of motion. Says Wiley, “Using weight to force a muscle stretch seems to do a better job of producing an adaptive response [i.e., improved flexibility] than regular stretching.” A good example of this type of exercise is the forward lunge, where you take a large step forward and then slowly bend both knees until the knee of your back leg almost touches the floor.
3. Post-workout Active Stretching
The best time to stretch your hamstrings (and other tight muscles) in more traditional ways is after your workout. “You can’t get a good quality stretch when the muscles are cold,” says Goldberg. But even now there are better options than conventional static stretches such as toe touches. Numerous research studies have shown that active stretching techniques such as active isolated stretching and proprioceptive neuromuscular facilitation (PNF) stretching produce faster and greater improvements in range of motion.
PNF Hamstrings Stretch
Lie face up with your left leg on the floor and you right leg elevated. Loop a towel around the heel of your right foot and hold the ends in your hands. Lift your right leg as high as you can without bending your knee. Pull gently on the ends of the towel to maintain this position. Hold the stretch for 15 seconds and then contract your hamstrings as though you’re trying to pull your leg back to the floor, but keep your leg from moving by pulling on the towel. Hold this contraction for 6 seconds and then relax your hamstrings and contract your quadriceps, pulling your leg a little farther toward your head. Hold this enhanced stretch for another 15 seconds and relax. Now repeat this sequence with the left leg.
Active Isolated Hamstrings Stretch
Lie on your back with both legs bent. Begin with one foot resting flat on the floor and the other leg elevated so that the thigh is perpendicular to the floor and the shin is parallel to the floor. Loop a strap or rope around the bottom of this foot and grasp the two segments together in your stretching-side hand next to your knee. By contracting your quadriceps, straighten the rope-looped leg completely. Pull toward your head on the rope until you feel a good stretch in your hamstrings. Hold it for one to two seconds and relax. Repeat this stretch a total of 10 times, then stretch the opposite leg.
Do one or two post-workout hamstrings stretches two or three times per week, along with some stretches for other tight muscles you may have. Add some dynamic warm-up stretches before every workout. And whenever you do a lower-body strength workout, be sure to include one or two exercises that require your hamstrings to lengthen against resistance through a full range of motion. If you’re consistent in these efforts, your hamstrings you’ll be touching your toes and enjoying the other benefits of optimally functioning hamstrings soon!
Hamstring Strains
Many athletes and exercisers believe that tight hamstrings predispose them to hamstring strains, or sudden, painful tearing of muscle fibers during intense activity. This is not exactly the case.
Hamstrings strains almost always occur during eccentric contractions of the hamstrings — that is, when the hamstrings are trying to resist their own lengthening, as during the lowering phase of a squat exercise. They most often occur when the hamstrings are stretched beyond their normal resting length while trying to contract. The best example is during sprinting, when you lift the thigh of your leading leg very high, stretching the hamstrings, and then suddenly contract the hamstrings to move your thigh back toward the midline of your body as you prepare for foot-ground contract.
It’s not hamstring tightness, per se, but poor eccentric strength of the hamstrings that leaves one prone to a strain at such moments. The best defense against hamstrings strains, along with a dynamic warm-up, is to regularly perform eccentric hamstrings strengthening exercises such as weighted squats. A study of elite Swedish female soccer players found that a preseason program of eccentric hamstrings strengthening reduced the incidence of hamstring strains by more than 300 percent.