What's more, the way your foot lands on the step will actually determine if you are firing up more muscles in your butt or in your thighs during your stair-climber workout. Most people overuse their quads to scale stairs, but if you land with your heel on the step rather than let it...
I had yet to acclimate to the weighty weightlessness, the suspension of time and gravity while reminding myself to breathe-1-2-3, when a thresher shark darted between us, slipping underneath our tether. Surly Substitute motioned up-up-up. Back to boat, her announcement sent group scrabbling ...