Leangains is another form of daily 16 hour fasting/ 8-hour eating window (16:8), invented by Swedish bodybuilder and personal trainer, Martin Berkhan in the mid-2000s as a way to lower body fat while building muscle. It is specifically tailored to fitness and strength training, and for those wanting to get as lean and strong as possible. Great emphasis is put on proper pre- and post-workout nutrition. There are also specific guidelines with regards to calorie cycling, food composition and meal timing. Thus, if you are interested in strength training and body composition, it is probably best to read up about Leangains on Martin’s comprehensive website.