Ditching the granny arms: yes, please. Lifting free weights next to some grunting ’roid monster at the local sweat box: no thanks. Find your way out of that ringworm-laden gym and into the capable hands of pro acrobat Shana Kennedy. Her private aerial classes start at $60 per hour and work the bejesus out of your triceps (and biceps, abs, and deltoids). Her method is like yoga meets ballet meets high school gym class — fifteen feet in the air. Split into four sections (warm up, static trapeze, corde lisse, and physical conditioning), instruction includes everything from rope shimmying to upside-down crunches. You come out looking lean, mean, and better than any free-weight-wielding Neanderthal. Making those 12th Street iron pumpers look like sniveling little girls? You’re welcome. Air Play, 101 West Harvey Street (215-849-1991 or airplaytrapeze.com).