TM,
I have not gone through DM training, but I swim a fair amount for general fitness (combo of lifting and swimming).
I'll add another vote for swimming -- obviously, the more you do, the better you'll become. Also, there is something to be said for getting used to being out of breath in the water (after swimming a hard set of laps) -- you are used to it and it makes you much less likely to panic in the water.
My suggestions would include:
- Get some decent swim goggles. Nothing screws up a workout more than leaky/poor fitting goggles. Decent speedo goggles are about $15-20.
- Tailor your workouts to match the DM swimming requirements. If the requirements are 400 yards swim and 500 yards snorkle, then try to include sets of this length in your pool workouts at least sporadically so you become used to the distance.
- Time yourself at least once in a while to get used to it. You'll soon become aware of what kind of pace you are maintaining without even looking at your watch -- useful if you are trying to hit a certain time in the tests. You will also be less likely to "psych yourself out" when it comes to the actual test.
- Start slow and work at it. I think a decent goal to try and work your way up to is 1 mile per workout (1,800 yards). Set initial goals of 500 or 1,000 yards and work your way up.
- Break up the work out -- DO NOT try and swim the entire distance without stopping...you'll just get frustrated (and swallow a lot of water). Start with a longer warm-up set (say 200 or 400 yards freestyle, aka crawl stroke), followed by sets of varying lengths with short 15-30 second breaks in between (obviously the fewer/shorter the breaks, the better). My current "normal" workout is as follows:
- 400 freestyle (slower speed -- warm-up)
- 100 breast
- 200 freestyle (mod/high speed)
- 100 kick (kickboard)
- 200 freestyle (mod/high speed)
- 100 breast
- 200 freestyle (mod/high speed)
- 100 kick (kickboard)
- 100 freestyle (sprint)
- 100 breast
- 200 freestyle (slower speed -- warmdown)
TOTAL = 1,800
Freestyle is the most taxing stroke -- I give myself time to recover between sets by mixing in kick and breaststroke sets.
One way to start would be to cut these distances in half. If you feel good after workout #1, then slowly increase the distances.
- Try and include sets with fins on. Kicking with fins on gives your legs an incredible workout....much better than without. If the DM swimming requirements include swimming with fins....pool time with fins on is a must, especially if you are prone to cramps. I find that surface swimming with fins on is much more ackward than underwater, so getting used to this in the pool (and getting your legs in shape) is a must.
- Underater swimming -- try this at the beginning of your workout if this is a DM test requirement. Set a goal of 25 yards (1 length) and try to work your way towards this.
- Stroke coaching (don't laugh) -- If you are not a big swimmer, this can really help. You don't have to hire an olympic coach, just find someone who has done some competitive swimming and get their advice. Focus on freestyle since this is the fastest stroke we humans have and the one you will want to use in your tests. Even 10-15 minutes of stroke advice on dry land (keeping your fingers together for better propulsion, etc) can make a big difference.
- Stick with it. The first few sessions may be tough (tiring, swallowed water, etc.), especially if it has been a while since you've done any lap swimming. The more you do, the better you will feel. Try to work up to 3-4 times a week.
Hope this helps. Sorry for the length -- I thought more details might be helpful.
Go get 'em tiger!
-LD