The researchers had expected that the first group of "master athletes" would have an increased ability to build muscle due to their superior levels of fitness over a prolonged period of time.
The dead was identified as 38-year-old Shai Gabay from Givat Olga in northern Israel.
Pick the best running shoes and go for an early morning run, get a shiatsu massage at home or use a new magnesium spray to relieve muscle pains, get ready for school or spray on the coolest scent.
How running cross-country inspired my life journey.
"International cooperation between Israel, the US and Britain strengthens common interests and new and exclusive capabilities in the Middle East," said the Head of the IDF's Air Division.
Exercising in tandem