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A study has found an almost 500% rise in the frequency and length of time a man's erection lasted after eating a vegetarian meal before bed, compared to when he ate a meat-based meal.

The Game Changers, released on Netflix on October 16, is a documentary that delves into a professional athlete's diet by comparing those who seek their protein intake from meat and those that adopt a meat-free diet.

One study compared the effects meat has on erection length and strength throughout the night after eating a vegetarian meal compared to eating a high-quality meat meal.

Dr Aaron Spitz, a leading urologist, attached a two-ringed device to three American footballers as they slept which read the performance and frequency of their erections.

(Image: GETTY)