Sonny Bill Williams’ leg burning routine is the most intense thing we’ve ever heard

Good grief, this sounds horrendous.

Sonny Bill Williams was in good form after learning he was cleared to play for New Zealand against Australia in the first Bledisloe Cup clash of the year. The All Blacks centre was suspended for the final Test of the Lions Series after his red card for dropping his shoulder on winger Anthony Watson in the Second Test at 'The Cake Tin'. He received a six-week ban but has got the all clear to face Australia. Perhaps it was confirmation of that news that saw Williams in such good form as he answered questions and engaged with his Twitter followers. He carried out the Q&A whilst undertaking a 30-minute watt bike session: https://twitter.com/SonnyBWilliams/status/887927663792316417 Williams even suggested his next pro-boxing bout would be on the undercard of Mayweather vs. McGregor in Las Vegas, next month: https://twitter.com/SonnyBWilliams/status/887929666794733568 Michael Conlan was trying to get on that card himself. We'd gladly have both - it's get our pay-per-view cash. Williams was asked by former England and Lions centre for his most intense 15-20 minute work-out on the watt bike would be. His response was scarcely credible and there are not many out there that could claim to be able to pull this off. SBW's 15-20 MINUTE WATT BIKE WORK-OUT

• 8 x 1 kilometres under 1 minute 15 seconds
• 10 burpees
• 45-second break between each set

All told, that should take you 20 minutes and leave you absolutely shattered. Not a bother to Williams though. The lad is some machine... https://www.instagram.com/p/BRsBs00F4VS/?taken-by=sonnybillwilliams&hl=en