Mechanosorption refers to the phenomena observed when wood is subjected simultaneously to mechanical loading and sorption resulting from changing hygrothermal conditions. A model based on the concept of hygro-locks has been recently reformulated. The hygro-lock spring further extends under load when softened, but is blocked when hardened. This approach offers an alternative to the widespread mechano-sorptive dashpot where the absolute value of moisture change replaces time increment. It will be presented and analysed in comparison with other models, and suggestions for further work will be discussed.