Last February, while swimming laps in an indoor pool, it occurred to me that I should try a repeat of the swim across Lake Washington that I did 40 years ago, when I was 19 years old. I decided that I could do better this time, planning it for August when the water is typically warmer, rather than July. I needed to scout out a new set of launching and landing spots: Lakeridge Community Beach has been closed for more than 20 years, and I remember the lifeguards at Kenneydale Beach refused to let me come ashore that day.
I measured the distance between Lakeridge and Kenneydale, finding it to be about 2 statute miles according to Google Maps. Then I measured the distance between the mouth of the Cedar River and Clarke Beach Park on Mercer Island. That turned out to be a nearly perfect 2.1 miles.
I announced my intentions to friends and family and then began testing my swimming speed and endurance. I measured the length of the laps in the indoor pool and timed myself while swimming 20 or 30 laps, then went home and calculated how far and how fast I had been going. It was about 1 mile per hour.
Next, I had to know if I could swim continuously for 2 hours. So I swam laps in the pool for 25 minutes before being interrupted by another swimmer. Once I had stopped I discovered that I had no sense of balance, and that quickly turned into motion sickness. I had to quit my workout.
Subsequent attempts at swimming continuously only generated the motion sickness problem again after only 15 or 20 minutes. It seems that rotating my head to breathe was causing the problem.
The next problem I encountered seemed trivial. Whenever I tried swimming at a vigorous pace, I kept getting minor cramps in my feet or somewhere in my legs. I didn't pay much attention to that problem. Endurance and motion sickness had my full attention.
The scheduled day for my swim across the lake arrived, but a call from my chase boat pilot ended the plan before we got started. He would not be able to paddle across the lake with a kidney stone. We rescheduled for the following weekend, but in the meantime, since the weather was very hot, I decided to make a trial run on the lake to test the water temperature, my equipment, and the navigation and communication possibilities between swimmer and kayak.
Fortunately I found a willing alternate kayak pilot and the two of us headed out for an afternoon outing in choppy, windy conditions.
My idea to prevent motion sickness was to use a scuba diving snorkle so I could keep my head in one position. That worked quite well. My wet suit seemed to cause too much drag, so I took it off, along with the wading shoes. Holding a straight course turned out to be difficult too. I tended to wander off course quite quickly, and I could not see either the boat or the paddle under water. I made up my mind that I had to keep looking above the surface once every ten strokes or so. I swam for a total of one hour and was only slightly tired. All systems seemed to be "go" for the following weekend.
The "following weekend" was this morning. It was just cold enough that I decided at the last minute to put on the wetsuit. I am a wimp about cold water, but we had to go early so the water would be calm.
We launched the kayak at 07:30 and I hit the lake at 08:00. The water was pleasantly cool, so as soon as I had adjusted to it I took off the wet suit and shoes. We struggled a bit with navigation and communication, but this time I had chosen to use my swim goggles instead of the scuba diving mask, and the visibility was much better out to the side. Of course there was nothing to see straight down. I watched for sea monsters anyway.
I think we had been out about 30 minutes when I got the first twinge of a cramp in my leg. I changed my stroke and let it relax out, as I have done for cramps many times before. Then I went back into my cruising pace. Within minutes the little warning cramps begain appearing in different leg muscles, so I kept changing my pattern, but soon it became apparent that whichever leg I switched to would immediately cramp up. We had gone just about half way to Mercer Island. The GPS said 1 mile or so.
I tried relaxing in a back float, but my legs just curled up under me. I laid face down in the water, breathing through the snorkle and had my kayak helper rub my legs. Then I slung my legs, one at a time, over the top of the boat so he could push the cramps out, but as soon as one was out, the other would cramp up again. The cramps began forming faster than we could treat them.
All this fiddling around with cramps meant I was not generating heat, and I began to get cold. We quickly decided to abort the mission and head for the nearest public beach. Kenneydale Beach was only about 1/3 of a mile away. I put on the life jacket for warmth and extra safety, and hooked my arms and legs around the bow of the kayak while we paddled ashore. Standing and walking soon had my leg cramps under control.
We recalled our pickup crew back from Mercer Island and within 15 minutes they arrived at Kenneydale Beach. I dried off and put on some warm clothes, so all was well except for the disappointment of not finishing the distance.
As I am writing this description, my legs are still stiff and sore. I have muscle strain in nearly every leg muscle from the cramps, but other than that I feel great.
I'm going to investigate the cause of the leg cramps and do something about that. Then I will begin a swimming workout regime using the snorkle, so I can be sure I can swim for long distances without motion sickness or cramps. Hopefully I will be ready for next August, when the lake water will be warm again, and I can call it a "60 year old" swim across the lake.