determine whether brisk walking with or without weight-lifting makes a difference on bone
metabolism. Nine healthy women performed two exercise bouts: brisk walking on a treadmill
for 30 min (E), and similar exercise carrying 5 kg of weight in a backpack (WE). Serum
parathyroid hormone (PTH), osteocalcin (OC), calcitonin (CT), procollagen type 1 carboxy
terminal propeptide (PICP), procollagen type 1 amino terminal propeptide (PINP), type 1 …