Bowling is a predominantly dependent upon the lower body. This glute stretch should be done before and after competition to help loosen up and cool down.
Figure 4 Glute Stretch National Bowling Academy
Try the Figure 4 Stretch for Tight Hips and Glutes
Dynamic Stretching Before Bowling and Static Stretching After, NBA
Glute Stretches: 4 Moves to Stretch Your Glutes
Bowling Tip of the Week: Simple Stretching for Better Scoring
A Ruthless Routine: That's How This Bowler Rolls - WSJ
The 10 Best Glute Stretches For Runners
4 Ways to Stretch Your Glutes Using Figure 4
Figure Four Glute Stretch
For peak performance, train like an athlete
The 5 Best Stretches For Knee Pain, Fitness