The world of Formula One was praying yesterday for that determination and fighting spirit to see the retired 44-year-old through a greater battle than anything he experienced on the racetrack.
Leaving the grand prix paddock can be a challenge for racing drivers, many of them still relatively young and accustomed to living life on the limit, who must seek their thrills elsewhere.
Schumacher took up motorcycle racing soon after he first retired from Ferrari in 2006, injuring his neck in a 2009 crash. Others, such as Australian Mark Webber who broke his leg while riding a mountain bike in an endurance event in Tasmania in 2010, have moved on to Le Mans.
"Michael loves to challenge race tracks on superbikes and he often excitedly shows his many amazing skydiving pictures on his phone," said the German's former Benetton team-mate Martin Brundle, now a commentator for Sky television.
"He's only a year out of the F1 cockpit but, as a driven and competitive person, you can't simply switch off and settle down at the end of a long career, you need challenges and achievements to keep the adrenalin flowing.
"It's not uncommon for racers to survive many big accidents to then be injured in cars, aviation, bikes, on water, or indeed ski slopes. The need for machinery and speed will always be there, it's inevitable," added the Englishman.
Just as many professional Alpine ski racers have a fascination for fast cars and motorbikes, so do fitness-obsessed racing drivers exhibit a love of extreme sports.
"Part of the reason that ex-drivers enjoy sports like skiing is because the physical rush that you get from the skis, through your feet and whole body and the adrenalin surge, is something you become an addict to," said former grand prix winner John Watson.
"Michael Schumacher raised the level of driver fitness and training, and part of his enjoyment of being a grand prix driver was extending the limits that were known at the time of race drivers' fitness, both physical and mental.
"It becomes habitual; if you are somebody like Michael Schumacher, that's a part of what your life is even though you are not directly involved in a competitive sport."
Ferrari always used to have an annual January gathering with their drivers in the Dolomites and Schumacher impressed with his skiing ability.
The German was on vacation with his family, skiing off-piste in the resort of Meribel when he fell and banged his head against a rock. He was wearing a helmet and, by all accounts, skiing well within his capabilities.
In the days when safety was virtually non-existent, those who made it through to retirement were the lucky ones. Even then, fate could be especially cruel.
Britain's Mike Hawthorn walked away from the sport in October 1958 as his country's first world champion. He died months later when he crashed his Jaguar sportscar into a tree.
Compatriot Mike Hailwood, a champion on two wheels and podium contender in F1 in the 1960s and early 1970s, died in a car crash in 1981 after nipping out for fish and chips, while French ex-Ferrari driver Didier Pironi was killed in 1987 while racing a powerboat.
The last driver fatality in F1 was the death, in 1994, of Brazil's Ayrton Senna but, despite the myriad advancements in safety, motorsport remains a dangerous pursuit.
Poland's Robert Kubica almost died, and certainly ended a F1 career that could have led him to Ferrari, when he crashed in a minor rally in Italy in 2011.
Ferrari's 2007 champion Kimi Raikkonen, who has also raced powerboats and rally cars, suffered injuries to his wrist in 2011 in a snowmobile incident.