I also live on the beach & NJ & although it’s a challenge, if you know how to structure your training, you can get amazingly fit for hills while living on the flats. I think the only negative w/ living in flat areas (as it relates to hills on the bike) is the inability to learn to descend well.
With that, the article below outlines a great method of training for hills on the flats. Depending on where you are, I know many SUPER fast triathletes & cyclists have spent hour upon hour in Island Beach State Park, doing variations on this.
FWIW - I wish I knew who wrote this as I’ve referenced it many times…
See below as this is a great article…
Ride Faster-Be Stronger!
Strength Training on the Bike
By: Author Unknown
This title is a bit misleading. If you become stronger on the bike, you will not only be a faster rider, but you will also be able to ride longer, push bigger gears, and run faster off the bike! Specific strength sessions are particularly designed for Half Ironman and Ironman triathletes, but also non-draft legal short distance athletes. Although, it should be part of the training regimen of triathletes racing ITU as well, it is not as crucial for them as it is for long distance triathletes, who have to be able to push big gears, during long periods of times.
By strength, we mean the force a rider can apply on the pedals. Because the power you develop on the bike is given by the speed multiplied by the strength you can apply, then improving your strength will make you a more powerful rider, and therefore a faster rider, provided you do not lose any leg speed. Indeed, if you can pedal at 90rpm on a 53x17, with 23mm tires, then you improve your strength to be able to push a 53x16 with the same cadence, your speed will jump from 35.6km/h to 37.8km/h! I guess it is worth it to give it a try…
The idea behind strength training is not to improve the force a fiber can generate, but more to recruit more fibers when pedaling. In order to achieve this, body-builders lift heavy weights very slowly to induce a near maximum contraction for a relatively long time. For cyclists, or triathletes it is the same principle which is applied, but still respecting the specificity of cycling. The best way to generate a near maximum contraction for a long period is to push very big gears at a slow cadence. When climbing, staying in the saddle, you will be able to develop even higher muscular contraction. These sessions are commonly done by professional cyclists. In the early season, to prepare for the classics, Frank Van Den Brouck (Cofidis) does between 6 and 10 times 3’ interval, in 53x14, on a 8% climb (actually, he does these session on the professional technogym trainer, similar to the computrainer, repeating 3’ interval at 500W, at 50rpm, 1’30’’ recovery). If you leave in a flat area, or if you don’t have climbs long enough, do not despair, these sessions can also be done on the flat (but the intervals need to be longer), into the wind, or on a turbo trainer, provided there is enough resistance to generate a high load on the muscles. If you prepare for a relatively flat Ironman, or an Ironman with steady climbs, a good strategy would be to couple specific strength sessions over hills, and on the flat.
Sessions over hills
Over 60km to 120km (depending on when your first race is, the distance, and your cycling background), after a thorough warm-up, start with 4x2km on a big gear, staying in the saddle maintaining a cadence between 50 and 70 (experienced triathletes could aim at 50 to 60rpm, but beginners and intermediate triathletes should not used gears with which they can not maintain between 65-70rpm). Use the downhill to recover. Build up to 6-7x3km for short distance triathletes, and 6x5km for Ironman athletes. Very experienced cyclists can build up progressively to 4x10km
Sessions on the Flats
We believe these sessions can be conveniently added in a long ride during the build period leading up to a big race, or during brick sessions, which will make the run even more challenging. Start with 10km efforts on the flat over a 50-60km ride maintaining a cadence of 60-65 during the beginning of the build up period. Ironman triathletes can build up to a total of 80km over a 6h ride, doing for example 4x20km, Rest:10’ on a big gear maintaining, 60-65rpm, if the goal is only to increase strength, and 70-75rpm if you want to make it more race specific.
Remarks
Do not attempt any of these sessions if you have knee problems (patella or ITB). If done over hills, focus on maintaining proper form (do not move upper body too much) avoid mashing the pedals, maintain the efficient pedal stroke you have (should have!) been working on during winter if done on the flat, and stay in the aero position, with our hands relaxed When recovering, try to maintain a high cadence (above 100rpm). As we said initially, power is speed x strength, therefore to be fully beneficial, you need to make sure that more strength will not decrease your leg speed.
This increased strength will make you a more powerful rider, and therefore a faster rider. But, it will also make you more economical on the bike, as at a given intensity, you will need a lower percentage of your maximal strength. Eventually, because the bike leg of the triathlon will be easier, you will have more energy when running off the bike, and indirectly, your improved strength will also be beneficial to your run.