The grill spaces on a helmet are small in order to prevent objects to enter inside the helmet. This small grill spaces on the helmet protect the face from very small as well as large objects. The main reason for making grill spaces small on the helmet so that we prevent the entering of the ball and avoid injury of the face so that's why we can say that grill spaces are small on the helmet.

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3 years ago

Jamar has decided that he is going to train for a marathon . he knows that it will take a lot of training and that he will need

Trava [24]

The part of muscle that he needs to train is the Slow-twitch muscle fibers.

<h3>What are Slow-twitch muscle fibres?</h3>

The Slow-twitch muscle fibers are the muscle fibres that are used to support long distance endurance journey such as the marathon race.

Therefore, the part of muscle that he needs to train is the Slow-twitch muscle fibers.

Learn more about muscle here:

brainly.com/question/13920046

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