Stitch is a pain that appears in your side as you exercise and could be related to posture.
Those who slump their upper back forward when they exercise are more prone to a stitch as the position aggravates the nerves in the abdominal wall.
Try standing up straighter when you exercise and the problem should improve.
Plyometrics
These movements are designed to increase speed and explosiveness while strengthening joints and muscles. Types of plyometric exercises include broad jumps, vertical jumps and explosive squats. But remember, safe and effective plyometrics are all about quality, not quantity.
Breathing techniques can help calm your nervous system and reduce muscular tension.
One key principle is to prolong your out breath, which helps to calm the body.
Try this technique:
1. Breath in through the nose, for a count of four
2. Pause for a count of one
3. Breath out slowly for a count of six.