Heavyweight rowers of both sexes tend to be very tall, broad-shouldered, have long arms and legs as well as tremendous cardiovascular capacity and low body fat ratios. Olympic or International level heavyweight male oarsmen are typically anywhere between 190 cm and 206 cm (6'3" to 6'9") tall with most being around 198 cm (6'6") and weighing approximately 102 kg (225 lb) with about 6 to 7% body fat.
The A1 S4 Driftwood by WaterRower delivers a total body workout, caters to fitness goals and exercise requirements. This rower is ...crafted out of fine-quality driftwood with an aluminum monorail. It is perfect for home or gym use and has a maximum user weight capacity of 375 pounds. The A1 S4 Driftwoood boasts features such as the WaterRower patented WaterFlywheel that gives life-like water rowing experience, a unique self-regulating resistance with infinite variable which suits any user, contoured seat with wheels that glide along the rail and comfortable rowing handles. It also comes with an S4 monitor that shows time per 2 or 500 kilometers, calories burned per hour, distance covered and total time of workouts. Maintenance of this rower is minimal. Simply add a purification tablet every 3-6 months. Tablets come with the package. When not in use, store the A1 S4 Driftwood vertically against a wall or in a closet. Buy your very own high-quality WaterRower Rowing Machine from Dazadi and get free shipping with every purchase. *WATER ROWER FOR HOME AND GYM USE - Crafted out of high-quality driftwood with aluminum monorail with no impact and non-load bearing, making it perfect for users with joint problems. Targets 84% of all major muscle areas like the arms, legs, back, shoulders, chest, core, etc. Water rower dimensions: 83 L x 22.5 W x 22.5 H Inches / Weight: 110 Pounds*LIFE-LIKE WATER ROWING EXPERIENCE - Features patented WaterFlywheel, unique self-regulating resistance, ergonomic seat and handles. Suits any user without need for adjustments. Maximum user weight: 375 Pounds. *TRACK YOUR PROGRESS - Water Rower comes with an intelligent S4 monitor that shows time per 2 or 500 kilometers, watts, calories burned per hour, distance, and the total time of workouts.*LOW MAINTENANCE AND SPACE EFFICIENT - This water rowing machine does not require lubrication or maintenance. User simply needs to add a purification tablet in the water every 3-6 months (tablets come with the package). When not in use, tip vertically against a wall or store in closet conveniently. read more
No matter the resistance we set or the power we applied, the machine remains sturdy, centered, and even. We amped up the intensity for 2000m sprints and found that the C2 supports consistent effort in a way water resistance can’t. The machine assists in keeping your intensity uniform, because it stores up remaining energy in the spinning flywheel. Comments about the ride feel of both Concept 2s were noticeably brief. As one tester put it, “It’s unremarkable because it’s good,” and leaves you free to focus on the effort you’re putting into your workout.
Decreasing  speed of waves as water becomes shallow has dramatic consequences on the beach. As the waves slow, their profile (Figure on right) is laterally compressed and since each wave must carry the same energy it becomes higher. As the wave approaches shore this process continues until the height exceeds 1/7 th the wave length and the wave becomes unstable. Then the wave breaks.
An 'oar' is often referred to as a blade in the case of sweep oar rowing and as a scull in the case of sculling. A sculling oar is shorter and has a smaller blade area than the equivalent sweep oar. The combined blade area of a pair of sculls is however greater than that of a single sweep oar, so the oarsman when sculling is working against more water than when rowing sweep-oared. He is able to do this because the body action in sculling is more anatomically efficient (due to the symmetry).
Being able to easily store your rower is a huge plus. Make sure you investigate how well the machine stores, if it folds up or comes apart easily to be able to put it in your closet, or in other storage areas. As an example, the Concept2 Model D rowing machine folds up nicely by a simple pull pin located in the middle of the rower. Wheels on the bottom allow for easy moving.

It is time to get into shape.  After doing some research and talking to a few experts, at least more expert than me, I determined rowing and swimming would be the best for me to loose weight with less strain on my body.  I researched and decided to rent (not buy) a Water Rower.  The one page rental application  is simple to complete and the staff telephone contacts were great, they answered questions, provided updates, made suggestions  etc.   The equipment showed up as promised.  Assembly is very simple one person job  and took just about a half hour, only one small allen wrench is required and it is provided. (save the box, its big but needs to be saved in the event you return the equipment)  The machine is classic and elegant.  It is not silent but the water swoosh sound is quite relaxing and soft.  I rented a previously used matching which is slightly less expensive  and shows a tiny bit of use but its exercise equipment so it is expected.  Customer service is outstanding and friendly.  The equipment seems really well designed and is simple to stand up and get out of the way.  The only issue I had involved the the filling of the tank.  Its cumbersome and could be made easier by a more convenient placement of the fill hole, it seems to be a slight design flaw.  I used a new long funnel (used to add oil to a car).  I checked out a few Youtube posts and videos and other users had the same minor complaint but overall everyone is really happy with this equipment.  NOW I NEED to MAKE MYSELF USE IT.
The table on the left gives the speed of waves of different wave lengths in deep water. “Deep” in this context is not an absolute value, but is relative to wave length. The simple relationship starts to to breakdown when the depth of the water is less than 1/4 th the wave length. At that depth the bottom exerts sufficient drag on the wave to slow its motion and thus decrease the wavelength [equations and more about wave speed].
Motion of the water is different than the motion of the wave. Water at each location moves in a circular path, but the motions at different locations are “out of phase”, which means that when water at the left of the diagram is moving to the right, water a quarter of a wavelength to the right is moving down, and water next to it is moving to the left, and next to it is moving up, etc. The overall effect is a an “apparent” wave moving to the right. Thus, the velocity (speed) of a wave is not at all the same as the velocity of the water.
Rowing is unusual in the demands it places on competitors. The standard world championship race distance of 2,000 metres is long enough to have a large endurance element, but short enough (typically 5.5 to 7.5 minutes) to feel like a sprint. This means that rowers have some of the highest power outputs of athletes in any sport.[35] At the same time the motion involved in the sport compresses the rowers' lungs, limiting the amount of oxygen available to them. This requires rowers to tailor their breathing to the stroke, typically inhaling and exhaling twice per stroke, unlike most other sports such as cycling where competitors can breathe freely.
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Of the four types of rowing machines or ergometers, water rowers are best at reproducing the sensation of on-water rowing. Their stroke cycles hold true to the dynamics of real paddling, and each stroke is punctuated with a splash! Water rowers have sliding seats to allow full-body cardiovascular workouts. (With cheaper rowing machines, in contrast, the seats don’t move.) These fitness machines tend to feature high quality parts and can last a lifetime.

This popular rowing machine utilizes magnetic resistance for a quiet, and very smooth workout. The Velocity Exercise CHR-2001 also features a programmable computer with 12 programs that will keep your exercising varied and challenging for years. The computer also provides data on distance, time, calories burned, pulse rate, strokes per minute, and stroke count. Additionally, the tension resistance is electronically controlled via the computer.  This electronic resistance control feature puts the CHR-2001 ahead of other magnetic rowers that tend to use knobs.

When waves run into water moving in the opposite direction, they are slowed, just as if they were approaching a beach. Wave length becomes shorter, wave height higher, and they may break. A good (bad) example of this is an ebb current flowing out of Raccoon Strait into waves coming in from the Golden Gate. Good rough water training, if that’s what you want.