New Delhi, Jan. 3 -- Fitness standards have seen a huge shift. From being inspired by Bruce Lee or the Karate Kid movies to Arnold Schwarzenegger and Sylvester Stallone's body types in The Terminator and Rocky or Rambo to today's activity-based style, fitness has become more inclusive. You could be fit today if you are not ripped but regularly run, cycle, do Pilates, or swim. One could play a sport twice a week. Pickleball has opened racket sports to all age groups and is easy on the joints.

Then comes adventure that could make you fitter: hiking, climbing, surfing, and for those who really want to push the boundaries, scuba diving. The most advanced (and possibly the most expensive) of these adventures in terms of risk and reward seems ...