Chris Hemsworth is obviously not someone who needs to lose weight for health or aesthetic reasons. The world's most handsome man and full-time Thunder God of Physique has no need of diet shakes.
However, it's easy to forget that his job is not actually being a hammer-wielding immortal with super strength, who can command lightning. No, Chris is an actor who plays many roles. It's just you may not have heard of or remember some of them. That's because he is so synonymous with Thor, a role that makes best use of his chiselled good looks, genuine charm and very big arms.
So you may or may not recall 2015's In The Heart of The Sea. Rotten Tomatoes' 'critical consensus' is that it was 'admirably old-fashioned', with 'thoughtful storytelling to match its visual panache'. The important thing is that because Chris H had to play someone who is shipwrecked, he needed to lose large amounts of weight.
Do you want to know how? It seems that, perhaps not surprisingly, he used a dieting technique that was cutting-edge at the time, which then became very popular, and now seems to be a bit off trend: intermittent fasting.
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Just tried a new diet/training program called "Lost At Sea". Wouldn't recommend it.. #IntheHeartoftheSea pic.twitter.com/y89McNuiiVNovember 22, 2015
As you can see, as well as having a comedy 'shipwreck beard' and hair, Chris acquired a much more rangy, lean and hungry look for In The Heart of The Sea. It's a little reminiscent of Brad Pitt in Fight Club, only with mad hair.
At the time, the Australian actor had not long finished filming Age of Ultron in which he has his better known, very muscular and toned look. Shortly after In The Heart of The Sea wrapped, he needed to bulk up again for The Huntsman: Winter's War.
According to Chris' personal trainer and friend Luke Zocchi, intermittent fasting is his go-to technique for this kind of rapid weight loss. Describing the results as 'crazy' to Insider, he said that intermittent fasting worked where all else had failed. This included going down to just 500 calories per day, which is definitely not something we recommend for any kind of extended period.
Luke gives a lot of interviews to help promote Centr, Chris Hemsworth's fitness and wellness programme. On this occasion he told Insider, "Everyone thinks of him in Thor, being big and muscly, but this was the big accomplishment for me. It was a huge challenge for us."
You can read our Centr review here, by the way.
It seems the type of fasting Chris used was a variation on the 16:8 diet. This essentially means you eat only during an 8-hour window each day.
The reference to '500 calories per day' means it's possible he also used the other most popular intermittent fasting variant, the 5:2 diet. This involves eating fairly normally for 5 days of the week but very little for the remaining 2 days – as little as 500 calories is sometimes suggested for that.
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Zocchi says intermittent fasting can help everyday dieters as well as Gods of Thunder who need to play someone who is starving. As you can see from the pic in Chris' Tweet, he was also still working out a lot, which helped to burn calories and must have contributed something to the weight loss.
With a reduced calorie intake due to fasting, "nutrition was a big deal," Zocchi says. "He was so tired from all the training we couldn't add any more workouts." We know the feeling, Chris! We can so identify with that.
As to whether you should try intermittent fasting, please bear in mind that Chris Hemsworth is a) the God of Thunder, and b) has advanced, professional dietary guidance and health care on tap. He also needed to lose weight fast for an acting job, which you probably don't.
To reiterate: we do not recommend crash dieting or starving yourself. This can be unpleasant at best and highly dangerous at worst. Depending on your body type and personal circumstances, it may not even be effective.
All we can tell you is that for Chris on this occasion, according to his PT and pal Zocchi, "We implemented intermittent fasting, along with lower calories, and it was crazy how much that worked" He adds, "It's a really good system to help lose weight. I always go back to that."
Zocchi most recently worked with Hemsworth for this year's Thor: Love And Thunder. I think we can rest assured that Chris is probably back to a healthy-looking, literally God-like physique for that one.