If your asthma is a problem when you work out, you may need some more meds. I had gone over 5 years without needing my inhailer more than a handful of times and then it suddenly got really bad (corresponded with my last pregnancy). I'm back on a daily steriod and using my rescue inhailer prior to working out and I'm feeling GREAT and even training for a marathon without ANY breathing issues. While I HATE taking medicine, this is truly necessary for me to live a normal life.
As for ideas, what kinds of workouts do you like? Find something you enjoy and set a date and a goal and then make a plan to achieve it (as you did with climbing the dunes!). I put my running schedule up on the fridge and it stares at me each day calling me to go for a run even when I don't want to. I LOVE crossing off each day and knowing I'm much more fit and feel much better because of keeping up with a plan. When I'm not training toward a particular goal, I feel like I'm wandering aimlessly in my fitness.
As for walking, being able to cover a particular distance may not be a challenge, but doing so at a faster pace is definitely a good goal. Some people can walk at a 10 minute per mile pace for a half marathon! Many can't even run that far at that pace.
Laura, Troy, Seth 6.24.06 , and Aaron 7.13.09