South Africa paceman Dale Steyn is spending two hours a day in hyperbaric chamber in a bid to be fit for the fourth Test against England.
Steyn recovered from a groin injury that ruled him out of the majority of the 3-0 series defeat to India to play the opening Test against England in Durban.
However, he injured his shoulder in the 241-run defeat and was ruled out of the drawn Cape Town Test and the third encounter that started in Johannesburg on Thursday.
The 32-year-old subsequently uploaded a picture to his Twitter account of the hyperbaric chamber, which uses 100 per cent oxygen in a bid to speed up the healing process.
Steyn accompanied the picture with a post that read: "2 hours a day for the next 14 days in this bad boy! Hyperbaric chamber. Boring, but healing." He later clarified he would go through the process for just seven days.
The follow up Tweet hints that Steyn will be available for the final contest that starts in Centurion on January 22.