How resistance swimming works in an endless pool, a tether or a small condo pool, what it does well, what it distorts, and how to program it.
Swimming pool sanitation explained for coaches and swim schools: what chlorine and pH really do, why the pool smells, and when to cancel a lesson.
A swim school operator’s guide to child swimming safety: ratios, entry checks, deep-water rules, floatation aids and incident procedures.