C Care1 New member Feb 23, 2009 #1 Hi. I just went to a pilates class, and when i was doing certain moves my muscles (in particular stomach) were really shaking. I'm young and I even have some abs, but what does this mean?
Hi. I just went to a pilates class, and when i was doing certain moves my muscles (in particular stomach) were really shaking. I'm young and I even have some abs, but what does this mean?