Do your regular bicep exercise but with your wrists turned back a bit for increased effectiveness. It's going to feel weird at first, but you'll become accustomed to it.Purefit Keto Pharmacie Do not hurt your lower back, learn to do a sit up the correct way. A yoga ball will also accomplish this if you place a rolled up towel on top of the ball beneath the lower back. You can put too much strain on your back if you anchor your feet while doing sit-ups.