The NHS has uploaded details of posts available for this year (though this is being updated, so keep your eye out). This is available at www.nhscareers.nhs.uk/hcstp along with details of STP open days. It is very difficult for applicants to get work experience in the NHS, but it is extremely helpful to have attended an open day or gone for a lab visit, so applicants should go along to an open day if at all possible.
The link above also has all the details of the person specification etc, as well as a comprehensive FAQs section, so it’s well worth a look.
Sports science degrees are still considered relevant, but it’s important for applicants to demonstrate clearly the relevance of their degree to the specialism that they’re applying for.