There are several ways in which fitness reduces the risk of different injury's.
I'm no expert, so don't quote me on anything, just telling you what I've been taught by some Olympic coaches and a bit of what I've read or learnt at A level PE which is not fun.
Hope this helps but I'm sure there's other benefits of fitness that I missed.
having fun
Does keeping your head up when lifting may be part of the process of making a safe lift, but doing that alone will not reduce the risk of injury. You need to hold you back and legs in appropriate positions to reduce risk of back injury during a lift.
Not allowing children to ride
Balance and coordination of physical fitness reduces your risk of injury while performing chores such as climbing ladders or carrying packages downstairs.
inspection and maintenance
Because it's been shown to reduce the risk of injury.
seatbelts and the body kit protect the people in the car and reduce the risk of injury
According to my research, there are two main safey measures one can take to reduce the risk of motorcycle injury. The number one and most important is to wear a helmet. The second is to wear reflective clothing.
yes it loosens your muscles so you wont pull anything
In order to manage a risk, you must first be aware of the risk. Once identified, various methods can be taken to reduce the likelihood and severity of any damage, injury or loss from that risk.
Reduce the risk of injury Increase the chances that drivers will be safe
anti lock brakes doesnt help you resuce the risk of injuries
There are no risks, or very minimal risks with agility exercises. In fact, agility exercises reduce the risk of injury while playing strenuous sports.