i got a lot annoyed by the fatigue bar sticking and shaking, more of it, doesnt exceed what it dropped under, even you rest for hours, still that bar not refreshed which is repugnant to logic. Therefore taking my joy i would like to have, so any progression for me is so vital.
The "shaking" is a limitation of Oblivion scripting that I'm fixing in the next version using new OBSE v0020 features. I'm also switching to using tokens with proper drain effects for the fatigue drains described below so your magic effects menu will show exactly how much encumbrance and wounds are affecting your fatigue. I'm not entirely sure when I'll have this finished.
The fatigue bar not fully refreshing is by design. RF includes a bunch of effects that model encumbrance and fatigue based on a realistic model derived from a fair bit of research. Fatigue represents the amount of "unfatigued muscles available for performing actions". The lower your fatigue, the less damage you do. Ideally low fatigue would also make you run slower and jump lower, but Oblivion doesn't provide easy ways of scaling running/jumping on a per-actor basis (I'm experimenting with speed, athletics, and acrobatics drains for the next version). The effects RF includes to model all this are;
1) A fatigue "drain" for encumbrance. Muscles preoccupied with lifting heavy gear are not available for performing other actions. The more you are carrying, the lower the limit on your max fatigue. The only way fatigue will recover past this limit is to drop stuff (or use a fortify fatigue spell). Note these muscles are not actually fatigued, just already busy lifting stuff. Adjustable with the encumbDrainGain setting.
2) A fatigue "drain" for wounds. Muscles damaged by wounds are not available for performing actions. The more wounded you are, the lower the limit on your max fatigue. The only way fatigue will recover past this limit is to heal yourself (or use a fortify fatigue spell). This is the reason actors can collapse from wounds before they die. Adjustable with the healthDrainGain setting.
3) A fatigue "burn" for encumbrance, Performing actions like lifting, walking, running, attacking, etc will burn more fatigue if you are carrying a lot of weight. Attempting to fight while carrying 100Kg of gear will exhaust you very quickly compared to fighting with just 10Kg of gear. This fatigue will recover if you rest, but even just lifting heaps of gear while standing will also burn some fatigue, so you will recover a bit slower unless you sit down and "take the weight off". Adjustable with quite a few settings that adjust max encumbrance and fatigue burns for different types of actions, but encumbMult is the main setting that adjusts how much extra fatigue burn encumbrance adds.
4) A fatigue "burn" for going uphill. Going uphill burns much more fatigue, particularly if you are carrying a lot. Adjustable with the climbMult setting.
There are also a bunch of extra "low fatigue indicators" like blur, pant, stagger, trip that affect NPCs as well as the player, so you know when you or your enemy is starting to get tired.