Hip and shoulder, the knee has a joint but it's a synovial joint.
The heart rate reserve is equal to the difference between maximum heart rate and resting heart rate. Maximum heart rate is usually calculated by:
Hmax = 220 - age
Hmax = 220 - 40 = 180
HRR = Hmax - Hrest
HRR = 180 - 75
= 105
The answer is B
The correct answer is C.
Age affects functional fitness. As one grows older, it becomes more difficult to maintains high level of fitness for various reasons. For instance, as one ages, the density and sizes of the bones in one's body shrink and they become more prone to fractures. Also, the energy level that one has reduces as one advances in age. Thus, as one grows older, it becomes necessary to participate less in physical activities.
Whether young or old studies have always shown that a consistently active person is far likelier to remain healthy and perform better at intellectual tasks. More specific benefits of exercise is a boost in the size of the hippocampus which is involved in verbal memory and learning. Including non-direct effects like mood and sleep, along with reduction in stress and anxiety. Burning off excess energy have shown help students relax and focus better on schoolwork like the study in 2009 where after 30 minutes of light aerobic exercise which improved the elementary students’ performance on academic tests. Although athletes may find a challenge in finding a balance arrangement between sports and school, many do find a working balance and have success in both areas. Given these points anyone can surmise that exercise is a great benefit to the body as well as the mind.
Sorry it's a little late :)