mountain climber  
noun [ C ] uk/ˈmaʊn.tɪn ˌklaɪ.mər/ us/ˈmaʊn.tən ˌklaɪ.mɚ/
  (PERSON)         
  登山者
a person who climbs mountains as a sport
  Her son became an extreme skier, a rock climber and a mountain climber.  她的儿子成为了一名极限滑雪者、攀岩者和登山者。 
  (优秀的)登山车手,山地自行车手
a person who is good at riding a bicycle up mountains
  He is regarded as the finest mountain climber cycling has seen in a generation.  他被认为是一代人中最优秀的山地自行车手。 
 - More examples
 - Arctic explorers or mountain climbers can sometimes lose fingers, toes, or even noses as a result of freezing temperatures.
 - An avid mountain climber, Cobb at 51 attempted to be the first American woman to scale Mount Everest.
 - Seattle mountain climber Ed Viesturs is close to his goal of climbing the world's 14 highest peaks without supplemental oxygen.
 - The domineering mountain climber is incomparably smooth on the bike.
 - In the race the best mountain climber wears a red spotted jersey, the "maillot à pois".
 
  (EXERCISE)      
 登山式运动(一种模拟爬山的全身性运动)
an exercise in which you start with your hands and feet on the floor and your legs stretched out, and then bring each leg in turn up towards your chest
  Doing a set of mountain climbers should get your heart rate up and burn fat too. 做一组登山式运动,应该能让你的心率提高,也能燃烧脂肪。 
 - More examples
 - The mountain climber is a challenge for the entire body, especially if you do it fast enough to act as a cardio workout.
 - A mountain climber is basically a plank where you run on the spot.
 - If you value efficient moves in your strength-training workouts, mountain climbers are a perfect fit.
 - Mountain climbers are a killer exercise that get your heart rate up fast while also firing nearly every muscle group in the body.