Arm strength can usually being improved as a result of three things:
1) Overall strength and power development
Here are a few softball conditioning tips:
Softball Conditioning Tips2) Throwing Mechanics
As mentionned above, this is key. You want to optimize your throwing mechanics.
Best video I have ever seen on the topic is the old classic Thowing Mechanics and Drills from Mike Candrea. I don't know if it is still available.
3) Softball-Specific Conditioning - Long Toss, Overload-Underload Throwing Protocol, etc.
Overloading-Underloading
1. Ensure proper warm-up before you start this protocol
2. Do this protocol early in a regular softball training session
3. Every throw is an all-out throw
4. Like anything, stop if any pain.
5. Don’t go heavier than 8.5 oz.
This protocol takes about 10 minutes to do and needs to be done twice a week to be effective.
Equipment:
• 5.5 oz softball
• Regular softball
• 8.5 oz softball
Protocol:
2 cycles of:
- 8 throws with 6.5 oz ball
- 8 throws with 8.5 oz ball
- 8 throws with 5.5 oz ball
Take a 2 minute break between each cycle.
Hope that helps.
Marc Dagenais
Softball Peak Performance Coach