It won't. But as a nurse pointed out to me, it's less about increasing the odds and more about minimizing regret.
My RE encouraged taking a walk a few hours post-transfer to get the blood flowing. I opted for bed rest on transfer day, took a walk the next morning and then just kept my activity on the milder side until beta day. Slow neighborhood walks, ran some errands, went out to eat, no heavy lifting, no gym. No idea if anything made a difference, but the transfer worked and my approach reduced my anxiety.