Hi David, good point about sit-ups and crunch exercises, after doing a lot of crunches I ended up with a very poor leaning forward at the waist posture, very bad for my back!
rickbowker 1 year ago
Hi David, good point about sit-ups and crunch exercises, after doing a lot of crunches I ended up with a very poor leaning forward at the waist posture, very bad for my back!
rickbowker 1 year ago