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.
1 Once your knee is close to your chest, release your hands and attempt to keep your leg above 90 degrees for 15 seconds. 2  Start timing when you release your hands and stop when your thigh drops below 90Â° (make sure to use a clock on the wall).  If you fail before 15 seconds then you have a weak psoas muscle.