Niagara Falls fitness equipment maker Jacobs Ladder has been acquired by Core Health & Fitness, a private-equity backed company that owns brands like Stairmaster, Schwinn and Nautilus.

If you like the variety you get from a tempo run, interval workout, or fartlek then you’ll love practicing this ladder workout, crafted by Noam Tamir, C.S.C.S., founder and CEO of TS Fitness in New ...