Aromatase inhibitors belong to an even broader class of drugs known as antiâestrogens. The other subcategory of drug under the anti-estrogens category is known as selective estrogen receptor modulators (SERMs), such as Nolvadex and Clomid. AIs and SERMs make up anti-estrogens.
Improve it: The only way to strengthen a weak psoas is by bringing your knee above 90 degrees. Sit with your knees bent on a low box or bench (6 to 10 inches high) (3). Maintaining good posture and keeping your abs tight, use your hips to raise one bent knee slightly higher than your hips.
Heel Raises. Heel raises strengthen the calf muscles. Do 8 to 12 repetitions several times during the day. 1  Stand with your feet a few inches apart, with your hands lightly resting on a counter or chair in front of you. 2  Slowly raise your heels off the floor while keeping your knees straight. 3  Hold for about 6 seconds, then slowly lower your heels to the floor.