HRM for swimming
Not all can be used for swimming. You'll have to read if they are waterproof (most are just water resistent, and some for less than 30 minutes).
No recommendation for you though... I don't use a HRM for swimming but go more based on feel and what I can maintain since there breathing and technique are more of a limiter for me.
Polars are the most common and both watch and strap are water resitant to 30-50m. In general though as Kyillee mentioned I think you'll find most will use perceived exertion in the pool and only use the HRM in a swim when under a wetsuit in a race.
I use a HRM for swimming mainly because my training plan requires me too. Many people are against using one in the swim and believe me..... we have had dangerous threads about this topic in the past. I almost got many "virtual" punchs because I promote it. But my logic is always.....my body is the same machine (or engine) during swimming biking and running so........ if I follow a certain HR in order to train accordingly to what I´m doing (base, speed, etc) I have to be consistent in the swim also.
In fact I´m following a Mark Allen 20week half ironman training plan and it states clearly the HR Zones I should follow in every swim session. And for me the results have shown. I´m swimming faster at a lower HR these days. Theory is the same as for biking and running I have witnessed that in my own results.
But again..... there are many trifuelers that will tell you how swimming is totally different and that you shouldn´t use a HRM. {haven´t figured out why my aerobic engine would function differently just because it´s in the pool, but apparently that´s what some people think, you can go with perceived exertion in the pool as you can go on the bike or on the run}
I use a Polar s720i and love it.
By the way............ if this mail is a bit aggressive forgive me! I just got pissed of at someone here at work :D. Arghhhh people are A$$%% sometimes!!!
Hyperactive Trifueler!!!! (I refuse to let the status go :p)
I use my polar S525 for swimming, biking and running. Its good because in a race I can keep a good running time total. I use it more for that than for the HR although I do track it some with it and it does work well.
What do you all think of the Timex Ironman watches? Either the Speed+Distance or the Bodylink(w/heart monitor). I don't have a computer for my bike either. Is this a good way to get it all?
From what I have heard the Timex durability is lacking when compared to the polar. Batteries wear out in the timex far earlier (so I have heard). I have the Polar 625x, have had it 2+ years and have not changed out the battery yet in the chest strap. Foot pod another story (every 20hrs).
Tikal, I did the MAO IM program for Australia this year - found it to be awesome - hope your training is going well. I still didn't wear my HRM in the pool tho - just checked pulse for 10s after each set. :)


I am looking for my first HRM and was wondering which is a good one to get. I have been looking around the forums and have found many recommendations, but none of them say whether or not they can be worn while swimming. Is this because it is a given and all of them can be worn underwater? I want to make sure I am training in the proper zones and all of that. I am thinking about the Polar FS1...I just need basic functions. Any thoughts?