Extreme Diet and Weight Loss Observations

An explorer named Mike Keene undertook an expedition in Greenland where he kayaked extensively while consuming a traditional Inuit diet, primarily consisting of protein and fat from marine sources. During the first trip, he lost 14 kilos while engaging in intense physical activity, likening it to running a half marathon daily in harsh conditions. Surprisingly, after returning to the UK, his weight rebounded to 90 kilos, sparking questions about the mechanisms of weight loss and maintenance. The experience prompted an exploration of how extreme diets combined with physical exertion affect body composition and energy expenditure in both active and inactive states.