The answer is B. Spine stretch
Spine stretch is an exercise to stretch your back bone, which mean your upper body, not the lower one.
NB :
Hip Flexor : To stretch your thigh
Calf stretch & Harmstring stretch : To stretch your lower legs
It has the proper muscles to com-bust the blood long enough for the oxygen to flow through the whole body and cleanse poor blood
The excessive<span> force causes the muscles to swell and</span>increases<span> the pressure against the bone, leading to pain and inflammation. Shin splints can also result from stress reactions to bone fractures. The </span>constant<span> pounding can cause minute cracks in the bones of the leg. ouch</span>
