diff --git a/src/batdetect2/train/optimizers.py b/src/batdetect2/train/optimizers.py
index c5b79cc..092e57a 100644
--- a/src/batdetect2/train/optimizers.py
+++ b/src/batdetect2/train/optimizers.py
@@ -3,6 +3,7 @@
 from collections.abc import Iterable
 from typing import Annotated, Literal
 
+from loguru import logger
 from pydantic import Field
 from torch import nn
 from torch.optim import Adam, Optimizer
@@ -84,4 +85,10 @@ def build_optimizer(
         Optimizer configuration. Defaults to ``AdamOptimizerConfig``.
     """
     config = config or AdamOptimizerConfig()
+
+    logger.opt(lazy=True).debug(
+        "Building optimizer with config: \n{}",
+        lambda: config.to_yaml_string(),
+    )
+
     return optimizer_registry.build(config, parameters)
diff --git a/src/batdetect2/train/schedulers.py b/src/batdetect2/train/schedulers.py
index e60e7df..73ebd09 100644
--- a/src/batdetect2/train/schedulers.py
+++ b/src/batdetect2/train/schedulers.py
@@ -2,6 +2,7 @@
 
 from typing import Annotated, Literal
 
+from loguru import logger
 from pydantic import Field
 from torch.optim import Optimizer
 from torch.optim.lr_scheduler import CosineAnnealingLR, LRScheduler
@@ -78,4 +79,9 @@ def build_scheduler(
     """Build a scheduler from configuration."""
     config = config or CosineAnnealingSchedulerConfig()
 
+    logger.opt(lazy=True).debug(
+        "Building scheduler with config: \n{}",
+        lambda: config.to_yaml_string(),
+    )
+
     return scheduler_registry.build(config, optimizer)