They're pretty easy to do. I could never do them as a kid but as an adult achieved them after two-three months of trying each day. (Forward splits, not straddle).
No major benefit other than stretching your groin muscle and hammies. Oh, and getting men aroused
"I think the basic anti-aging diet is also the best diet for prevention and treatment of diabetes, scleroderma, and the various "connective tissue diseases." This would emphasize high protein, low unsaturated fats, low iron, and high antioxidant consumption, with a moderate or low starch consumption.
In practice, this means that a major part of the diet should be milk, cheese, eggs, shellfish, fruits and coconut oil, with vitamin E and salt as the safest supplements."
- Ray Peat