To make it short, veg*an athletes should follow the same recommendations as veg*ans that are not athletes. Indeed, several studies have been done on the topic and here I summarize the most important ones, stating which considerations have been done for each subject:
State of the art
Medical science has no final assessment on veg* diets and sport.
This is really just a matter of 'let me google it for you'. The first hit yields a nice list.
Interestingly, there are endurance athletes as well as strength athletes.
Catra Corbett, ultra marathoner and general badass
Carl Lewis, sprinter, long jumper and multiple Olympic gold medalist
Brendan Brazier, iron man triathlete and author
I hope you've read the closely related answer (here).
Intensive sport training, and therefore weightlifting, demands higher levels of nutrient intake. The nutrient that is most likely to be insufficient in people doing such kinds of training is - as you pointed out - iron. The first thing an athlete has to do is to periodically check the blood status, and ...
Energy is usually not a concern since lots of fresh and sundried fruits have plenty of calories.
However, the word "energy" has also another meaning: "vitality". In other words, some lack of nutrients can make you feel weak and "without energy". It's definitely possible to have a complete and balanced diet with raw food. You should check whether you might ...
Aside from alpinism/mountaineering, there are many scenarios where people might want a lot of food that doesn't weigh too much. Long journeys like through-hikes, mountaineering, or voyage by train or ship all have similar requirements so I'll try to provide an answer that works for all of them.
For lightweight food that lasts, the primary objective is to ...
You totally can be a vegetarian and a body builder. I am a body builder for 35 years and a vegetarian for about 7 or 8 years. I feel much better meatless and my workouts have never suffered.
There are good sources of plant based protein meals out there, like potatoes and corn or rice and black beans. In combination these meals have a complete amino acid ...
As some people suggested in comments, yoga is very broad term. You are probably referring to physical activity of stretching in variety of poses. For a person practicing yoga, becoming vegan part of yoga itself. It has positive effects on your body so it has to have positive effects on your yoga and well being. It's simply very natural to become free of ...
Energy-dense and simple to prepare
Basically everything that is high in carbs, low in water content and can be prepared by boiling for less than 15 minutes in one pot:
Rice (can't be whole rice, or it will take long to cook)
Pasta (whole wheat)
Add some red lentils or split peas right into the same pot for quick-cooking proteins.
These calorie-dense no-bake trail bars were designed for backpacking– packing the most amount of calories into the the least weight. They are also recipe my whole family enjoys. Consider these as a Clif-Bar replacement for mid-day snacks or even a meal replacement. Credit for this recipe goes to the hiker named “Bigfoot” who got the recipe from hiker “Even ...
Pinnaple juice (or mixed fruit) is a great alternative. Other fruits might also work but stay away from apples as it thickens too much.
You definitely want to try add some ice into the mixer. A chilled soy shake seems to make a big difference, the same applies to non-vegan shakes. I can't really find a good source for this claim, but temperature has a play ...
Quality Material Matters
There are many vegan shoes on the market that use a goodyear welt, but wheather or not they are durable is dubious.
As it was mentioned on /r/goodyearwelt, a GYW design only makes sense if the boot's upper is durable enough to outlive the sole. Many cheap faux leathers will crack and fall apart with wear in a short time, but some ...
Most energy-dense options
Couscous and peanut butter are the most energy-dense vegan foods by both weight & volume that don't require cooking (excepting sugar, which is more energy dense but doesn't satisfy hunger).
Consider the following items:
Spices (easiest are bullion cubes or the just-add-water soup ...
Dried nuts are a particularly dense source of calories and nutrients, including as spreads like in peanut butter. Tofu would be too watery, as commented by Zanna. Tempeh (fermented tofu) is a plausible middle-ground option. Lentils or beans are also good options with relatively few calories compared to more standard offerings like crackers. Also consider ...
I agree with what everyone is saying above. If you have not heard of Kendrick Farris or his story as a vegan lifter, you should check it out. He puts to rest a lot of stereotypes and misconceptions about veganism. In addition, he let's you in on his diet and how he builds muscles with plant protein. Here is the link to the article.
I have to add one of my favorite ones to this list: Jermain Defoe, professional football player, currently a player of Bournemouth FC in the Barclays Premier League and who has credited his vegan diet as an important reason behind his top form despite his age.
He is also involved in different social causes and has his own charity foundation.
Nick Diaz and Nate Diaz, two brothers, are MMA fighters in the Ultimate Fighting Championship. Nick is the former Strikeforce champion, and Nate has plenty of accolades of his own. They're two of the highest level fighters in the world. They also do marathons and triathlons.
They're usually pescetarian, but go full vegetarian during "fight camp", which is a ...
On caloric density with bikepacking
In the past decade, I (vegan) have gone on several multi-thousand-kilometer-long cycling trips and also multi-day or longer-than-a-week trekking trips. These two types of trips are very different!
In the case of trekking, you will likely be deep in the mountains. You'll see few people, you'll get your water from streams, ...
I think that the calorific content of food is simple, i.e.:
Fat: 9 (kcal per gram)
So a "high-calorie-density carb" is just whatever food contains the least water and most carbs -- for example, sugar (4 kcal/g) or dry couscous (3.75 kcal/g).
You increase calorie density by using drier (more dehydrated) foods with less fibre, ...