The skeleton is made up of bone ❌ and cartilage - these consist of ❌ cells. ❌ brings nutrients and oxygen to these cells like any other. Bone is continually ❌ and rebuilt. ❌-bearing exercises ❌ bone growth, whilst inactivity makes ❌ weak and less ❌.

When muscles contract, they get ❌. Muscles are attached to bones by ❌, so when the muscle contracts, it ❌ on the bone and so enabling movement ❌ the bone is part of a joint. Muscles can only cause bones to move by ❌. This means that a muscle can only move a bone in one ❌ so muscles work in ❌ pairs - one muscle contracts while the other ❌. To move in the ❌ way, the relaxed muscle contracts while the contracted muscle relaxes.

In order to know whether a new ❌ programme has made a positive impact on fitness, it is important to ❌ measurements regularly. These measurements could include:
the type and duration of exercise done on different days over a ❌ of time
a food ❌ so that nutrition can also be evaluated
❌ heart rate
blood ❌
breathing ❌
duration of ❌ period after completing a particular exercise or workout
BMI
❌ body fat
weight ❌ or gained
Recording more than one type of measurement is important because some measurements of fitness may show an ❌, but others may not.
It is important to consider the ❌ of each type of measurement of fitness, and whether it can be repeated under the same ❌, in order to evaluate its reliability.
For example, if blood pressure was being monitored a ❌ figure could be attained. Values should be obtained using a ❌ method - such as sitting down with the arm at chest height - to ensure repeatability was accurate. If this method was not followed then the result would not be ❌. Values could also be altered if the person was stressed.
Another example would be monitoring your BMI. This value could vary on an ❌ basis depending on your food and fluid intake. To ensure accuracy, the reading should be taken at the same ❌ of day to make results usefully comparable.

A physiotherapist is a ❌ professional who ❌ in treating people who have skeletal-❌ injuries.
Physiotherapists work out programmes of movements and ❌ for patients to follow in order to increase their ❌ of movement, ❌ and strength after an injury.