Question

DESCRIBE THE EFFECTS OF CHANGES IN LEVER LENGTH ON MUSCLE FORCE OUT PUT BOTH IN ANATOMICAL AND MECHANICAL LEVER WHEN INSTRUCTING FITNESS ACTIVITIES

Answer 1

Answer:

Altering lever length can also affect how hard an exercise is. For example, with the abdominal curl, the easiest version involves performing the exercise with the hands on the thighs. ... With the press up, altering lever length and the effects of gravity can change the intensity of the exercise.Just as moving the fulcrum of a teeter totter can increase the effectiveness of a force, the nature of muscle attachment to bone relative to the joint increases the efficiency of muscle contraction and thus, body movement.Muscles and bones act together to form levers. ... Levers can be used so that a small force can move a much bigger force. This is called mechanical advantage. In our bodies bones act as lever arms, joints act as pivots, and muscles provide the effort forces to move loads.An example of a first-class lever is a pair of pliers or scissors. First-class levers in the human body are rare. One example is the joint between the head and the first vertebra In the short term, exercise can lead to muscle fatigue and soreness. In the long term, exercise can lead to muscle hypertrophy and other physiological changes. These physiological changes alter the muscle to make repeat exercise easier.Change the order of the exercises. This way the body has no idea what to expect and it has to respond differently. ...

While keeping proper form, increase the number of reps you are doing in 30-seconds by increasing your speed. ...

While keeping proper form, add a jump to the movement. ...

Reduce your rest interval.

Explanation:

Answer 2

Answer: This may help you

Explanation:

Muscles and bones act together to form levers. A lever is a rigid rod (usually a length of bone) that turns about a pivot (usually a joint). Levers can be used so that a small force can move a much bigger force. This is called mechanical advantage.

Mechanical advantage

Levers can be used so that a small force can move a much bigger force. This is called mechanical advantage. In our bodies bones act as lever arms, joints act as pivots, and muscles provide the effort forces to move loads.

There are four parts to a lever – lever arm, pivot, effort and load. In our bodies:

• bones act as lever arms

• joints act as pivots

• muscles provide the effort forces to move loads

• load forces are often the weights of the body parts that are moved or forces needed to lift, push or pull things outside our bodies.

Levers can also be used to magnify movement, for example, when kicking a ball, small contractions of leg muscles produce a much larger movement at the end of the leg.

Levers are able to give us a strength advantage or a movement advantage but not both together.