I'm currently 73. Years ago I smoked but quit in 1983 and haven't smoked since. Since then I've done mountain climbing and strenuous hiking and backpacking trips along with x country skiing. A year ago I was diagnosed with COPD and saw a pulmonary specialist. After a lot of experimentation and research, along with advice from the specialist, I ended up taking Stiolto, a long acting inhaler but also use Ventolin, which is considered a "rescue inhaler". I found that taking Ventolin before a hike or other strenuous activity made my breathing better during the course of the hike.
Everyone is different and it's very important to try different medications until you find the one that's right for you. I tried 4 different long term inhalers before I found the right one. I'm still out hiking new trails and plan to keep on going.