The “conversational pace” test
“If you can easily carry on a full conversation and perform the activity at the same time, you probably aren’t working hard enough,” said the charity.
If you can sing and still maintain the same level of effort, you’re still probably not working hard enough to reap the rewards down the line.
However, if you can exchange brief sentences with someone while you’re doing the activity, but a lengthy conversation is uncomfortable, then you’ve hit the golden spot.
Being able to speak, but not hold full-on lengthy conversations, is indicative that you’re working out at the correct intensity level.