Core Strength, sprinting

Hello, although I answer you from a martial artist point of view, it holds good no matter what the sport.
The martial artist should train in resistance from a multi-directional i.e. all angles, multi-positional i.e. prone, upright, horizontal, bent-over, with multi-exercises.
This type of training creates a muscular balance in the whole body, which in turn brings economy of movement and injury prevention.
In the forefront of training today core training has taken the stage. When I heard of this at the first I realised the importance of the core in any discipline. So I tested my core strength in different ways, like the bridge. The person is on their forearms and toes (much like the press-up position but on the forearms.) One arm is then stretched out to the side and held for 30secs, then the other, then legs one at a time raised. I went from an empty hand to 7kg dumbbell. I then got a training partner to load weight disks on to my back when in the bridge position and was able to stay firm up to and with 100kg. (Loading increments of 25kg.) I didn’t go any higher because the load was becoming unstable.

My point is this, because of my way of training with resistance i.e. in a multidirectional, multi-positional with multi-exercises. My core was already strong and better still was a balanced strength. That is to say I did not concentrate on core exercises alone to do this.
In my experience this is the better way to strengthen the core and certainly prevent injury.
By the way the picture that you see was when I was in my 70th.year Deadlifting 172Kgs.
Regards toughern