Remember, you do not have to go to the expensive stores to buy great workout wear, go to the discount stores and look for clearance items on the major labels websites for great bargains. The most important thing is that you need clothing that is breathable. Wearing jeans to the gym and working out in them is not only inappropriate for the gym, but it is not great for sweating, stretching and just doing gym workouts. If in doubt, as the personal trainer Portland for some tips on what type of clothing they recommend and where are some of the better deals in the city to get exercise clothing. They are in tune with what is trendy, popular, but also what really works, so as them what they wear when they are not only working, but also exercising.
The rule of thumb is to wear shoes that are comfortable, but will also give you the support in the activity you are doing. In addition, breathable materials are recommended both indoor and outdoor, especially when the conditions are hot and maybe humid. Having good airflow so the body can cool itself down efficiently is extremely important, especially when exercising outdoors.
If you are going to be exercising outdoors, then you want wear light colored clothing and either very breathable & light material warm up pants or shorts. If you are running, then shorts will be the better choice because of the amount of movement you will be doing with the legs. On the flip side, if you are going to be hiking, then a lighter material type of hiking pant would be a better choice because of the plats, shrubs, etc., that may poke your legs when walking through those trails.