Acceleration is a change in velocity. In most cases this is measured from a dead stop to X distance in seconds.
WHY is acceleration important?
Simply put, if you can beat your opponent to the most optimal position, you win.
WHERE does this occur?
Practically this could be a football player getting off the line, a basketball player staying in a good defensive position, a tennis player getting across the court to return a hit, or in the most visible environment a sprinter's first 4-6 steps.
WHAT movements are we looking to coach?
POSTURE
If you can control your spine position while moving, you can put more force into the ground. Look for a neutral spine and head in line with the spine. The weight room is where you strengthen these positions. Conditioning should be where you condition these positions, not just a time to run your athlete's to "increase their cardio." Every repetition is important.
BODY ANGLES
When your posture is in sync, your lower body needs to create solid angles to produce the highest amount of force into the ground. Bad angles = leaked potential force. Each step we are looking for one leg to be in full triple extension (hip, ankle, knee) and the other to be in hip/knee flexion, and ankle dorsi-flexion.
BAD EXAMPLE GOOD EXAMPLE
FOOT POSITION
I touched on it a bit in the body angle portion, but I believe it holds so much more importance. When teaching acceleration from a 2 point or 3 point stance I almost always see the same thing. A plantar flexed foot that pulls all of the weight on the athletes toes. What we want is a foot that is more dorsiflexed to create a quicker elastic response to the ground and a decreased amount of time to putting force into the ground. It all comes down to eliminating the "unnecessary movements" we don't need.
BAD EXAMPLE GOOD EXAMPLE
Check in next week for PART 2 for some movement drills to teach acceleration.
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