File ported to SE and posted here with Code Serpent's permission
The following is mostly copy-pasted from the original mod page, with minor edits for the ports functionality:
Original Mod Link:
Your body, and the bodies of female NPCs, will change depending on your skills, to reflect your physical capabilities. This is done through Bodyslide Morphs. Each skill has been assigned a Bodyslide preset, and as you increase your experience in that skill, your body will become more like that preset. Your arms will become burly if you train in combat skills, your legs will become thick and toned if you train in stealth skills, and your chest will bulge from training in magical skills.
In addition to skills, you can enable weight gain, and arousal changes.
Gorging on a feast will now leave a mark on your character, distending their stomach until you rest (if Stuffing is enabled), and the more food you eat, the larger your character will become (if Weight Gain is enabled). Fasting or dieting will slowly slim your character, but illicit drugs like Skooma can also send your metabolism into overdrive, slimming your character faster.
NPCs are also set to a certain body weight depending on their level and vanilla body weight. At 100 vanilla body weight, and level 1, an NPC will have 100 mod body weight; the higher the level, the lower their mod weight. As of version 1.1, NPCs can gain weight if they eat food. You will need an additional mod to feed NPCs.
If your character ends up having a lot of sex, and can't stop thinking about sex, then they will turn into a full fledged bimbo, with all the required assets (requires SexLab Aroused). The higher your Sex Addiction (ie SLA Time Rate) the larger your assets will become. NPCs can also experience this effect.
These changes will only happen if your sleep often enough, or drink skill-based potions with the Potion Addon installed. You can also press 'Force Body Update' in the MCM.
The MCM has several options to customize how your body will change. How large you can become, and how quickly you grow, as well as options on how NPCs, both unique and non-unique, will change.
If you don't like the Bodyslide morphs I've made for this mod, you can customize your own and import them into the game. To do this, download the Bodyslide Presets, and Bat Files, and follow these instructions. Reference the images above for additional aid.
Open and make changes to the BodySlide preset to the skill you want to change. Only edit the 'High Weight' side of the preset.
Copy the appropriate Bat file to the 'Skyrim' folder, one level up from the 'Data' folder.
Edit the Bat folder with the changes you've made to the preset, taking the difference of the High Weight and Low Weight.
Open up the Game, and call the bat file through the console: bat [Bat File Name]
Perform steps 1-4 for all skill morphs you want to edit.
Open the MCM and select 'Update Globals'
(Optional) Select 'Force Body Update' in the MCM to see the changes immediately.
Simply install the main file, and the Potion Addon if you want it, through your mod manager. Load order does not matter for the main file, but the Potion Addon should be loaded after any alchemy overhaul.
You should select 'Force Body Update' in the MCM the first time you load the game after you install the mod, and every time you start a new character.
For armor or clothing to work you need to build their meshes through BodySlide, with 'Build Morphs' checked.
Before you uninstall the mod, you should select 'Reset Body Morphs' in the MCM to reset your character's body. If you have NPC morphing enabled, you should disable that, enable 'NPC Morph Spells' and use the 'Restore Body' spell on any NPC that has been changed by this mod.
If you've lost track of which NPCs were changed by this mod, use the Netimmerse Override Cleaner mod.
SE Port Preface
I have not done extensive testing of the port. It is functional, I got it working both in the MCM and to a lesser extent noticeable in-game changes; it is also stable and has yet to be the cause of a crash for me. Please note that as I am not a good modder, nor am I the mod creator, I cannot help with most issues related to the mod
My testing did not use the potion addon so I have no idea what it does or if it works
1/ Some times (most of the time) your body won't update on sleeping. In this case you have to go into the MCM and hit "Force Body Update" for the changes to take effect