Track and field’s Athletics Integrity Unit suspend Ruth Chepngetich after record marathon runner’s positive doping test.

For some people, improving VO2 max could help you attain longer, sustained workouts, and offer potential cardiovascular benefits, experts say.  So, whether you’re an athlete, or simply ...

Track and field’s Athletics Integrity Unit said Chepngetich tested positive for a banned diuretic and masking agent in March.

Ruth Chepngetich has been provisionally suspended by the AIU after failing a drug test. She currently holds the Marathon ...