When you work out, keep your pace low for a few minutes at the start and end of your workout. That way, you warm up and cool down each time. You don't have to do the same exact thing every time. It's more fun if you change it up.
Definition of chance would be a fine thing. British, informal. âused to say that something good or desirable is not likely to happen This candidate promises to solve all the country's financial problems in six months. Chance would be a fine thing!
Because valuable has come to mean that it is worth a substantial amount, invaluable has been used in the opposite meaning, that it is worth very little (the instances in the OED are from 1640, 1803, and 1865, so it is not very common today).